I'm tracking the files for ED on github at http://github.com/flickerfly/Electronic-Discovery. You'll find the Eagle schematics, Fritzing files, An Arduino sketch and even a picture of what ED would look like on a breadboard.
You can also download the latest collection of files in these formats:
ED (Electronic Discovery) is specifically designed to engage a family with a friendly faced gadget which is easy to assemble, write code for and encourages them to interact. Ideally this makes electronics a family hobby rather than something Dad does alone. Older children could find much opportunity to learn a bit about electronics by studying schematics and assembling ED. Younger children's minds will begin to be engaged with the idea of making things and will begin to pickup the basics of electricity as they see schematics built and learn component names.