Even the most loving fathers tend to get upset when their kids destroy "...VCRs, DVD players, a Nintendo Wii, a Sony PS3, [and] numerous mobile phones." With smart phones costing lots more than older stupid phones, and most tablets costing even more, Greg Pilling decided to make aluminum and plexiglass smartphone and tablet cases strong enough to be, if not childproof, at least child-resistant. Since he owned an auto parts manufacturing company in Tucson, AZ, it was no big deal for him. So now he has SASCASE as a second business, and can make you a case for almost any kind of mobile device you might own. His cases look plenty tough, and they aren't cheap. But if you want to save money and make your own, Greg says plans for all cases he makes are open source (even though they aren't on his website yet). Also on the open source front, he is working on an open source "ruggedized" tablet he hopes to bring to market "in the $300-$400 range" to compete with the Panasonic 7” Toughpad that runs more like $1100.

A couple of weeks ago you had the chance to ask Khan Academy lead developer Ben Kamens about the future of online education and the academy itself. Below you'll find his answers to the questions we sent and a few extra that he found interesting.