ARDX - The starter kit for Arduino:

If you've ever wanted to dive into the electronics world but were afraid to try, then this is the perfect kit for you. Geared towards beginners, this fun fully-illustrated kit will familiarize you with a wide range of electronic components while you create small, simple, and easy-to-assemble circuits.  The instructions are clear and include diagrams, troubleshooting tips, and additional instructions for those of you who want to take their projects to the next level. With 13 different activities outlined, you'll have your hands full!