Found this today, 'Little bits'

"littleBits is an opensource library of discrete electronic components pre-assembled in tiny circuit boards. Just as Legos allow you to create complex structures with very little engineering knowledge, littleBits are simple, intuitive, space-sensitive blocks that make prototyping with sophisticated electronics a matter of snapping small magnets together."

They havn't got any sets on sale at the moment, but I'd be interested in trying it out when they are. As I have no knowledge of electronics at all!!

b*

littleBits intro from ayah bdeir on Vimeo.