No Starch Press just released two nice books. Arduino Project Handbook by Mark Geddes has 25 beginner-friendly projects that use Arduino (a low cost electronic prototyping platform), including a Simon-like memory game, a weather station, and a
wireless ID card entry system. Electronics for Kids, by Øyvind Nydal Dahl, starts with an easy-to-grok explanation of voltage and current, and has a lot of practical information about components and tools and instructions on how to use breadboards and a soldering iron. The projects look like fun, too. One is a musical instrument that makes sci-fi sounds, and another is a sunrise-activated alarm clock.
Both books are full color throughout and beautifully designed.