The project from Chapter 9 of JavaScript for Kids For Dummies by Chris Minnick and Eva Holland
The finished project from Chapter 16 of JavaScript for Kids For Dummies by Chris Minnick and Eva Holland.
No-Library (pure JS), HTML, CSS, JavaScript
based on 'bubbles' by Anthony Pipkin (http://jsfiddle.net/apipkin/qUTwQ/light/)