diff --git a/accessible/app.component.js b/accessible/app.component.js
index 3a79c328c..9d8e7e494 100644
--- a/accessible/app.component.js
+++ b/accessible/app.component.js
@@ -33,6 +33,7 @@ blocklyApp.AppView = ng.core.Component({
   </div>
 
   <blockly-block-options-modal></blockly-block-options-modal>
+  <blockly-toolbox-modal></blockly-toolbox-modal>
 
   <div>
     <blockly-toolbox></blockly-toolbox>
@@ -47,7 +48,8 @@ blocklyApp.AppView = ng.core.Component({
   `,
   directives: [
       blocklyApp.ToolboxComponent, blocklyApp.WorkspaceComponent,
-      blocklyApp.BlockOptionsModalComponent, blocklyApp.SidebarComponent],
+      blocklyApp.BlockOptionsModalComponent, blocklyApp.SidebarComponent,
+      blocklyApp.ToolboxModalComponent],
   pipes: [blocklyApp.TranslatePipe],
   // All services are declared here, so that all components in the
   // application use the same instance of the service.
@@ -56,7 +58,7 @@ blocklyApp.AppView = ng.core.Component({
       blocklyApp.ClipboardService, blocklyApp.NotificationsService,
       blocklyApp.TreeService, blocklyApp.UtilsService,
       blocklyApp.AudioService, blocklyApp.BlockOptionsModalService,
-      blocklyApp.KeyboardInputService]
+      blocklyApp.KeyboardInputService, blocklyApp.ToolboxModalService]
 })
 .Class({
   constructor: [
diff --git a/accessible/block-options-modal.component.js b/accessible/block-options-modal.component.js
index 7bbeb946d..0aeb69969 100644
--- a/accessible/block-options-modal.component.js
+++ b/accessible/block-options-modal.component.js
@@ -51,36 +51,7 @@ blocklyApp.BlockOptionsModalComponent = ng.core.Component({
       </div>
     </div>
   `,
-  pipes: [blocklyApp.TranslatePipe],
-  styles: [
-    `.blocklyModalCurtain {
-      background-color: rgba(0,0,0,0.4);
-      height: 100%;
-      left: 0;
-      overflow: auto;
-      position: fixed;
-      top: 0;
-      width: 100%;
-      z-index: 1;
-    }
-  `, `
-    .blocklyModal {
-      background-color: #fefefe;
-      border: 1px solid #888;
-      margin: 15% auto;
-      max-width: 600px;
-      padding: 20px;
-      width: 60%;
-    }
-  `, `
-    .blocklyModalButtonContainer {
-      margin: 10px 0;
-    }
-  `, `
-    .blocklyModal .activeButton {
-      border: 1px solid blue;
-    }
-  `]
+  pipes: [blocklyApp.TranslatePipe]
 })
 .Class({
   constructor: [
diff --git a/accessible/block-options-modal.service.js b/accessible/block-options-modal.service.js
index b064766a8..7411acb96 100644
--- a/accessible/block-options-modal.service.js
+++ b/accessible/block-options-modal.service.js
@@ -26,7 +26,11 @@
 blocklyApp.BlockOptionsModalService = ng.core.Class({
   constructor: [function() {
     this.actionButtonsInfo = [];
-    this.preShowHook = null;
+    this.preShowHook = function() {
+      throw Error(
+          'A pre-show hook must be defined for the block options modal ' +
+          'before it can be shown.');
+    };
     this.modalIsShown = false;
     this.onHideCallback = null;
   }],
diff --git a/accessible/media/accessible.css b/accessible/media/accessible.css
index 038668126..77918fa90 100644
--- a/accessible/media/accessible.css
+++ b/accessible/media/accessible.css
@@ -10,7 +10,7 @@
   float: left;
   margin-left: 10px;
   margin-top: 20px;
-  width: 150px;
+  width: 200px;
 }
 
 .blocklyAriaLiveStatus {
@@ -35,3 +35,28 @@
 .blocklyDropdownListItem[aria-selected="true"] button {
   font-weight: bold;
 }
+
+.blocklyModalCurtain {
+  background-color: rgba(0,0,0,0.4);
+  height: 100%;
+  left: 0;
+  overflow: auto;
+  position: fixed;
+  top: 0;
+  width: 100%;
+  z-index: 1;
+}
+.blocklyModal {
+  background-color: #fefefe;
+  border: 1px solid #888;
+  margin: 15% auto;
+  max-width: 600px;
+  padding: 20px;
+  width: 60%;
+}
+.blocklyModalButtonContainer {
+  margin: 10px 0;
+}
+.blocklyModal .activeButton {
+  border: 1px solid blue;
+}
diff --git a/accessible/sidebar.component.js b/accessible/sidebar.component.js
index 2c259ea70..9d70afbbe 100644
--- a/accessible/sidebar.component.js
+++ b/accessible/sidebar.component.js
@@ -37,6 +37,10 @@ blocklyApp.SidebarComponent = ng.core.Component({
           {{buttonConfig.text}}
         </button>
       </span>
+      <button (click)="showToolboxModal()"
+              class="blocklySidebarButton">
+        Create new block group...
+      </button>
       <button id="clear-workspace" (click)="workspace.clear()"
               [attr.aria-disabled]="isWorkspaceEmpty()"
               class="blocklySidebarButton">
@@ -50,8 +54,10 @@ blocklyApp.SidebarComponent = ng.core.Component({
 .Class({
   constructor: [
     blocklyApp.NotificationsService, blocklyApp.TreeService,
-    blocklyApp.UtilsService,
-    function(_notificationsService, _treeService, _utilsService) {
+    blocklyApp.UtilsService, blocklyApp.ToolboxModalService,
+    function(
+        _notificationsService, _treeService, _utilsService,
+        _toolboxModalService) {
       // ACCESSIBLE_GLOBALS is a global variable defined by the containing
       // page. It should contain a key, customSidebarButtons, describing
       // additional buttons that should be displayed after the default ones.
@@ -63,6 +69,7 @@ blocklyApp.SidebarComponent = ng.core.Component({
       this.notificationsService = _notificationsService;
       this.treeService = _treeService;
       this.utilsService = _utilsService;
+      this.toolboxModalService = _toolboxModalService;
     }
   ],
   handleButtonClick: function(buttonConfig) {
@@ -77,5 +84,8 @@ blocklyApp.SidebarComponent = ng.core.Component({
   },
   isWorkspaceEmpty: function() {
     return this.utilsService.isWorkspaceEmpty();
+  },
+  showToolboxModal: function() {
+    this.toolboxModalService.showModal();
   }
 });
diff --git a/accessible/toolbox-modal.component.js b/accessible/toolbox-modal.component.js
new file mode 100644
index 000000000..426c903b9
--- /dev/null
+++ b/accessible/toolbox-modal.component.js
@@ -0,0 +1,197 @@
+/**
+ * AccessibleBlockly
+ *
+ * Copyright 2016 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Angular2 Component representing the toolbox modal.
+ *
+ * @author sll@google.com (Sean Lip)
+ */
+
+blocklyApp.ToolboxModalComponent = ng.core.Component({
+  selector: 'blockly-toolbox-modal',
+  template: `
+    <div *ngIf="modalIsVisible" id="toolboxModal" role="dialog" tabindex="-1">
+      <div (click)="hideModal()" class="blocklyModalCurtain">
+        <!-- The $event.stopPropagation() here prevents the modal from
+        closing when its interior is clicked. -->
+        <div class="blocklyModal" (click)="$event.stopPropagation()" role="document">
+          <h3>Select a block for the new group...</h3>
+
+          <div *ngFor="#toolboxCategory of toolboxCategories; #categoryIndex=index">
+            <h4>{{toolboxCategory.categoryName}}</h4>
+            <div class="blocklyModalButtonContainer"
+                 *ngFor="#block of toolboxCategory.blocks; #blockIndex=index">
+              <button [id]="getOptionId(getOverallIndex(categoryIndex, blockIndex))"
+                      (click)="selectBlock(categoryIndex, blockIndex); hideModal();"
+                      [ngClass]="{activeButton: activeButtonIndex == getOverallIndex(categoryIndex, blockIndex)}">
+                {{getBlockDescription(block)}}
+              </button>
+            </div>
+          </div>
+          <hr>
+          <div class="blocklyModalButtonContainer">
+            <button [id]="getCancelOptionId()" (click)="hideModal()"
+                    [ngClass]="{activeButton: activeButtonIndex == totalNumBlocks}">
+              {{'CANCEL'|translate}}
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  `,
+  pipes: [blocklyApp.TranslatePipe]
+})
+.Class({
+  constructor: [
+    blocklyApp.ToolboxModalService, blocklyApp.KeyboardInputService,
+    blocklyApp.AudioService, blocklyApp.UtilsService, blocklyApp.TreeService,
+    blocklyApp.NotificationsService,
+    function(
+        toolboxModalService_, keyboardInputService_,
+        audioService_, utilsService_, treeService_, notificationsService_) {
+      this.toolboxModalService = toolboxModalService_;
+      this.keyboardInputService = keyboardInputService_;
+      this.audioService = audioService_;
+      this.utilsService = utilsService_;
+      this.treeService = treeService_;
+      this.notificationsService = notificationsService_;
+
+      this.modalIsVisible = false;
+      this.toolboxCategories = [];
+      this.firstBlockIndexes = [];
+      this.activeButtonIndex = 0;
+      this.totalNumBlocks = null;
+
+      var that = this;
+      this.toolboxModalService.registerPreShowHook(
+        function(toolboxCategories) {
+          that.modalIsVisible = true;
+          that.toolboxCategories = toolboxCategories;
+
+          var cumulativeIndex = 0;
+          that.toolboxCategories.forEach(function(category) {
+            that.firstBlockIndexes.push(cumulativeIndex);
+            cumulativeIndex += category.blocks.length;
+          });
+          that.firstBlockIndexes.push(cumulativeIndex);
+          that.totalNumBlocks = cumulativeIndex;
+
+          that.activeButtonIndex = 0;
+          that.keyboardInputService.setOverride({
+            // Tab key: no-op.
+            '9': function(evt) {
+              evt.preventDefault();
+              evt.stopPropagation();
+            },
+            // Enter key: selects an action, performs it, and closes the
+            // modal.
+            '13': function(evt) {
+              var button = document.getElementById(
+                  that.getOptionId(that.activeButtonIndex));
+
+              for (var i = 0; i < that.toolboxCategories.length; i++) {
+                if (that.firstBlockIndexes[i + 1] > that.activeButtonIndex) {
+                  var categoryIndex = i;
+                  var blockIndex =
+                      that.activeButtonIndex - that.firstBlockIndexes[i];
+
+                  that.selectBlock(categoryIndex, blockIndex);
+                  break;
+                }
+              }
+
+              that.hideModal();
+            },
+            // Escape key: closes the modal.
+            '27': function() {
+              that.hideModal();
+            },
+            // Up key: navigates to the previous item in the list.
+            '38': function(evt) {
+              evt.preventDefault();
+              if (that.activeButtonIndex == 0) {
+                that.audioService.playOopsSound();
+              } else {
+                that.activeButtonIndex--;
+              }
+              that.focusOnOptionIfPossible(that.activeButtonIndex);
+            },
+            // Down key: navigates to the next item in the list.
+            '40': function(evt) {
+              evt.preventDefault();
+              if (that.activeButtonIndex == that.totalNumBlocks) {
+                that.audioService.playOopsSound();
+              } else {
+                that.activeButtonIndex++;
+              }
+              that.focusOnOptionIfPossible(that.activeButtonIndex);
+            }
+          });
+
+          setTimeout(function() {
+            document.getElementById('toolboxModal').focus();
+          }, 150);
+        }
+      );
+    }
+  ],
+  getOverallIndex: function(categoryIndex, blockIndex) {
+    return this.firstBlockIndexes[categoryIndex] + blockIndex;
+  },
+  selectBlock: function(categoryIndex, blockIndex) {
+    var block = this.toolboxCategories[categoryIndex].blocks[blockIndex];
+    var blockDescription = this.getBlockDescription(block);
+    var xml = Blockly.Xml.blockToDom(block);
+    var newBlockId = Blockly.Xml.domToBlock(blocklyApp.workspace, xml).id;
+
+    var that = this;
+    setTimeout(function() {
+      that.treeService.focusOnBlock(newBlockId);
+      that.notificationsService.setStatusMessage(
+          blockDescription + ' added to workspace. ' +
+          'Now on added block in workspace.');
+    });
+  },
+  getBlockDescription: function(block) {
+    return this.utilsService.getBlockDescription(block);
+  },
+  // Focuses on the button represented by the given index.
+  focusOnOptionIfPossible: function(index) {
+    var button = document.getElementById(this.getOptionId(index));
+    if (!button.disabled) {
+      button.focus();
+    } else {
+      document.activeElement.blur();
+    }
+  },
+  // Returns the ID for the corresponding option button.
+  getOptionId: function(index) {
+    return 'toolbox-modal-option-' + index;
+  },
+  // Returns the ID for the "cancel" option button.
+  getCancelOptionId: function() {
+    return 'toolbox-modal-option-' + this.totalNumBlocks;
+  },
+  // Closes the modal.
+  hideModal: function() {
+    this.modalIsVisible = false;
+    this.keyboardInputService.clearOverride();
+    this.toolboxModalService.hideModal();
+  }
+});
diff --git a/accessible/toolbox-modal.service.js b/accessible/toolbox-modal.service.js
new file mode 100644
index 000000000..7bf2c0bed
--- /dev/null
+++ b/accessible/toolbox-modal.service.js
@@ -0,0 +1,84 @@
+/**
+ * AccessibleBlockly
+ *
+ * Copyright 2016 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Angular2 Service for the toolbox modal.
+ *
+ * @author sll@google.com (Sean Lip)
+ */
+
+blocklyApp.ToolboxModalService = ng.core.Class({
+  constructor: [function() {
+    this.modalIsShown = false;
+    this.onHideCallback = null;
+    this.preShowHook = function() {
+      throw Error(
+          'A pre-show hook must be defined for the toolbox modal before it ' +
+          'can be shown.');
+    };
+    this.toolboxCategories = [];
+
+    // Populate the toolbox categories.
+    var toolboxXmlElt = document.getElementById('blockly-toolbox-xml');
+    var toolboxCategoryElts = toolboxXmlElt.getElementsByTagName('category');
+    if (toolboxCategoryElts.length) {
+      this.toolboxCategories = Array.from(toolboxCategoryElts).map(
+        function(categoryElt) {
+          var workspace = new Blockly.Workspace();
+          Blockly.Xml.domToWorkspace(categoryElt, workspace);
+          return {
+            categoryName: categoryElt.attributes.name.value,
+            blocks: workspace.topBlocks_
+          };
+        }
+      );
+    } else {
+      // If there are no top-level categories, we create a single category
+      // containing all the top-level blocks.
+      var workspace = new Blockly.Workspace();
+      Array.from(xmlToolboxElt.children).forEach(function(topLevelNode) {
+        Blockly.Xml.domToBlock(workspace, topLevelNode);
+      });
+
+      this.toolboxCategories = [{
+        categoryName: 'Available Blocks',
+        blocks: workspace.topBlocks_
+      }];
+    }
+  }],
+  registerPreShowHook: function(preShowHook) {
+    this.preShowHook = function() {
+      preShowHook(this.toolboxCategories);
+    };
+  },
+  isModalShown: function() {
+    return this.modalIsShown;
+  },
+  showModal: function(onHideCallback) {
+    this.onHideCallback = onHideCallback;
+    this.preShowHook();
+    this.modalIsShown = true;
+  },
+  hideModal: function() {
+    this.modalIsShown = false;
+    if (this.onHideCallback) {
+      this.onHideCallback();
+    }
+  }
+});
diff --git a/demos/accessible/index.html b/demos/accessible/index.html
index 1b6e7f9d3..ae0d20cd5 100644
--- a/demos/accessible/index.html
+++ b/demos/accessible/index.html
@@ -21,6 +21,7 @@
   <script src="../../accessible/utils.service.js"></script>
   <script src="../../accessible/audio.service.js"></script>
   <script src="../../accessible/block-options-modal.service.js"></script>
+  <script src="../../accessible/toolbox-modal.service.js"></script>
   <script src="../../accessible/keyboard-input.service.js"></script>
   <script src="../../accessible/notifications.service.js"></script>
   <script src="../../accessible/clipboard.service.js"></script>
@@ -29,6 +30,7 @@
 
   <script src="../../accessible/field-segment.component.js"></script>
   <script src="../../accessible/block-options-modal.component.js"></script>
+  <script src="../../accessible/toolbox-modal.component.js"></script>
   <script src="../../accessible/toolbox-tree.component.js"></script>
   <script src="../../accessible/toolbox.component.js"></script>
   <script src="../../accessible/sidebar.component.js"></script>