I saw these things on another site I frequent, thought you guys would be interested. (And I didn't find them in search)
Sure, anybody who has built a robot could build these things, but they're intended for young kids, not for us.
I don't know if imbedding vimeo vids work, but here goes.
[youtube]
Cubelets Engineering Prototypes[/youtube]
And here's the link if it fails.
Cubelets Engineering Prototypes