When you become an adult, it seems most people switch from Etch-A-Sketches to zen gardens. Finally, someone has combined the best of both — doodling on a large scale — with a dose of technology added in for all us geeks.

Nowhere does there exist such a disparity in function as there does between the different kids of smartphone apps. They can be used to save your buns from driving too drunk, and now they can be used to shoot people. Of course. Laser tag for our post-laser age, the Xappr or Micro-Zappr Gun can attach to your smartphone and turn any place into a battlefield, at any time.

The notion I find most seductive when it comes to 3D printing is its parallels to digital distribution. If I want something, I can find it on the Internet and zap it right into the home — my 3D printer will whip it up. We're not there yet, but we've got a little peek of that future through MakerBot Playsets.

The form and function of an old school 8mm video camera is back — having been shrunk to keychain toy size. If you love vintage film or just want to play this digital version of an 8mm camera the Fuuvi Bee is retro heaven.