On Kickstarter, IndieGogo, and other crowdsourcing sites, inventors seek funding from the public. But how do you know if a project is worth backing if nobody has ever tried it out? In this Yahoo Tech exclusive, we test the prototypes and tell you which inventions have promise.
This Week In Crowdfunding
Headphones to Help You Sleep, a Universal Stylus, and Blocks That Teach Electronics
We Try Bluesmart, a Travel Bag That Can Weigh Itself and Charge Your Gadgets