To the long list of great ideas gone bad, add the UV Waterworks--a simple, cheap device to purify filthy drinking water in poor countries.

FORBES: Running dry

By simply visiting the Parents Portal on MEEPTablet.com from any device with a web browser (computer, smart phone, tablet), parents can not only hand-pick ("whitelist") which websites or keywords their kids have or don't have access to, but they can add words to the tablet's built-in "bad word" list so their child will not be able to search for those words or use them in the chat feature.

ENGADGET: Oregon Scientific MEEP! tablet ships for $150, gives kids a safe, exclamation-filled place to play