Magnetic Silly Putty [Instructables]
Recreate Any Image in Jigsaw Puzzle Form With Ji Ga Zo [Wired: GeekDad]
Xtranormal: Videos Anyone Can Make [mental_floss Blog] - Easy DIY animated videos.
Another Reason Kids Should Make Their Own Board Games [Wired:GeekDad]
Hackety Hack Teaches Ruby Programming to Aspiring Beginners for Free [Lifehacker] - Also, you could have them try Scratch.