diff --git a/src/components/prompt/prompt.css b/src/components/prompt/prompt.css
new file mode 100644
index 000000000..e7a12d9d9
--- /dev/null
+++ b/src/components/prompt/prompt.css
@@ -0,0 +1,71 @@
+@import "../../css/colors.css";
+@import "../../css/units.css";
+
+.modal-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    z-index: 1000;
+    background-color: rgba(94, 102, 125, .95);
+}
+
+.modal-content {
+    width: 360px;
+    margin: 100px auto;
+    outline: none;
+    border: 3px solid rgb(126, 133, 151);
+    padding: 0;
+    border-radius: $space;
+    user-select: none;
+
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+    color: #5d647a;
+    overflow: hidden;
+}
+
+.body {
+    background: $ui-pane-gray;
+    padding: 1.5rem 2.25rem;
+}
+
+.label {
+    font-weight: 500;
+    margin: 0 0 0.75rem;
+}
+
+.input {
+    margin-bottom: 1.5rem;
+    width: 100%;
+    border: 1px solid rgba(0,0,0,.1);
+    border-radius: 5px;
+    padding: 0 1rem;
+    height: 3rem;
+    color: #6b6b6b;
+    font-size: .875rem;
+}
+
+.button-row {
+    font-weight: bolder;
+    text-align: right;
+}
+
+.button-row button {
+    padding: 0.75rem 1rem;
+    border-radius: 0.25rem;
+    background: white;
+    border: 1px solid $ui-pane-border;
+    font-weight: 600;
+    font-size: 0.85rem;
+}
+
+.button-row button.ok-button {
+    background: $blue;
+    border: $blue;
+    color: white;
+}
+
+.button-row button + button {
+    margin-left: 0.5rem;
+}
diff --git a/src/components/prompt/prompt.jsx b/src/components/prompt/prompt.jsx
new file mode 100644
index 000000000..d2411468b
--- /dev/null
+++ b/src/components/prompt/prompt.jsx
@@ -0,0 +1,74 @@
+const React = require('react');
+const ReactModal = require('react-modal');
+const bindAll = require('lodash.bindall');
+const Box = require('../box/box.jsx');
+
+const styles = require('./prompt.css');
+
+class PromptComponent extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleOk',
+            'handleKeyPress'
+        ]);
+    }
+    handleKeyPress (event) {
+        if (event.key === 'Enter') this.handleOk();
+    }
+    handleOk () {
+        this.props.onOk(this.input.value);
+    }
+    render () {
+        return (
+            <ReactModal
+                isOpen
+                className={styles.modalContent}
+                overlayClassName={styles.modalOverlay}
+                onRequestClose={this.props.onCancel}
+            >
+                <Box className={styles.body}>
+                    <Box className={styles.label}>
+                        {this.props.label}
+                    </Box>
+                    <Box>
+                        <input
+                            autoFocus
+                            className={styles.input}
+                            placeholder={this.props.placeholder}
+                            ref={el => (this.input = el)}
+                            onKeyPress={this.handleKeyPress}
+                        />
+                    </Box>
+                    <Box className={styles.buttonRow}>
+                        <button
+                            className={styles.cancelButton}
+                            onClick={this.props.onCancel}
+                        >
+                            Cancel
+                        </button>
+                        <button
+                            className={styles.okButton}
+                            onClick={this.handleOk}
+                        >
+                            OK
+                        </button>
+                    </Box>
+                </Box>
+            </ReactModal>
+        );
+    }
+}
+
+PromptComponent.propTypes = {
+    label: React.PropTypes.string.isRequired,
+    onCancel: React.PropTypes.func.isRequired,
+    onOk: React.PropTypes.func.isRequired,
+    placeholder: React.PropTypes.string
+};
+
+PromptComponent.defaultProps = {
+    placeholder: '...'
+};
+
+module.exports = PromptComponent;
diff --git a/src/containers/blocks.jsx b/src/containers/blocks.jsx
index 69ae0bf1d..e319c920f 100644
--- a/src/containers/blocks.jsx
+++ b/src/containers/blocks.jsx
@@ -4,7 +4,7 @@ const PropTypes = require('prop-types');
 const React = require('react');
 const VMScratchBlocks = require('../lib/blocks');
 const VM = require('scratch-vm');
-
+const Prompt = require('../components/prompt/prompt.jsx');
 const BlocksComponent = require('../components/blocks/blocks.jsx');
 
 const addFunctionListener = (object, property, callback) => {
@@ -23,6 +23,8 @@ class Blocks extends React.Component {
         bindAll(this, [
             'attachVM',
             'detachVM',
+            'handlePromptCallback',
+            'handlePromptClose',
             'onScriptGlowOn',
             'onScriptGlowOff',
             'onBlockGlowOn',
@@ -32,20 +34,27 @@ class Blocks extends React.Component {
             'onWorkspaceMetricsChange',
             'setBlocks'
         ]);
-        this.state = {workspaceMetrics: {}};
+        this.state = {
+            workspaceMetrics: {},
+            prompt: null
+        };
     }
     componentDidMount () {
         const workspaceConfig = defaultsDeep({}, Blocks.defaultOptions, this.props.options);
         this.workspace = this.ScratchBlocks.inject(this.blocks, workspaceConfig);
 
+        this.ScratchBlocks.prompt = (message, defaultValue, callback) => {
+            this.setState({prompt: {callback, message, defaultValue}});
+        };
+
         // @todo change this when blockly supports UI events
         addFunctionListener(this.workspace, 'translate', this.onWorkspaceMetricsChange);
         addFunctionListener(this.workspace, 'zoom', this.onWorkspaceMetricsChange);
 
         this.attachVM();
     }
-    shouldComponentUpdate () {
-        return false;
+    shouldComponentUpdate (nextProps, nextState) {
+        return this.state.prompt !== nextState.prompt;
     }
     componentWillUnmount () {
         this.detachVM();
@@ -72,6 +81,7 @@ class Blocks extends React.Component {
         this.props.vm.removeListener('VISUAL_REPORT', this.onVisualReport);
         this.props.vm.removeListener('workspaceUpdate', this.onWorkspaceUpdate);
     }
+
     onWorkspaceMetricsChange () {
         const target = this.props.vm.editingTarget;
         if (target && target.id) {
@@ -124,6 +134,13 @@ class Blocks extends React.Component {
     setBlocks (blocks) {
         this.blocks = blocks;
     }
+    handlePromptCallback (data) {
+        this.state.prompt.callback(data);
+        this.handlePromptClose();
+    }
+    handlePromptClose () {
+        this.setState({prompt: null});
+    }
     render () {
         const {
             options, // eslint-disable-line no-unused-vars
@@ -131,10 +148,20 @@ class Blocks extends React.Component {
             ...props
         } = this.props;
         return (
-            <BlocksComponent
-                componentRef={this.setBlocks}
-                {...props}
-            />
+            <div>
+                <BlocksComponent
+                    componentRef={this.setBlocks}
+                    {...props}
+                />
+                {this.state.prompt ? (
+                    <Prompt
+                        label={this.state.prompt.message}
+                        placeholder={this.state.prompt.defaultValue}
+                        onCancel={this.handlePromptClose}
+                        onOk={this.handlePromptCallback}
+                    />
+                ) : null}
+            </div>
         );
     }
 }