Programming and electronics for kids
By Darryl Gove-Oracle on Oct 27, 2009
The other on-going project is a microcontroller - the STM Primer. Includes a screen, tilt sensor, and a single button.
On the electronics side (which is what lead me to microcontrollers in the first place), this is a nice article on kits for kids, and a second earlier one. There's also a bunch of kits available at makershed (the most surprising one is an EX-150, which is a couple of kits up from what I had. I think I had the EX-60). Here's a list of some microcontroller starter kits, and a different list of microcontroller like options.