I grew up on 50-in-1, 100-in-1, 150-in-1 and I think a 200-in-1 which were electronics kits that radio shack put out that let you mock up different circuits like an alarm for your room, a crystal radio, and others.
Here’s a similar kit, but for microcontrollers. I haven’t tried it out yet, but it looks good for starter microcontroller projects. If you’ve got played with it, drop a comment and let us know what you’ve made with it and what you think! – Link