Switched On: A toy for the smartphone gaming generation

The first thing worth noting about Sifteo Cubes -- which recently became available for pre-order at $149 for a starter pack of three that should start shipping this month -- is that they are not geometrically true to their name. Their square surfaces sit atop depths that are less than half their side length, so even stacking two Cubes won't produce three-dimensional symmetry. They are a little smaller than the game pieces from the much more limited and less expensive Scrabble Flash digital letter-arranging game that was a hit last holiday season.

The pieces fit comfortably between two fingers for easy gripping, flipping and rearranging, which you'll need to do a lot of in their various games. They are also a good size to substitute for many handheld playthings, reminding one of overstuffed Mahjongg tiles but also akin to shrunken toddlers' alphabet blocks or playing cards. The sides and back are otherwise nondescript except for a set of contacts on their rear used for charging. Sifteo Cubes are charged via their tray, which showcases them through a translucent plastic top with room for three more Cubes at $45 each. Different games derive different levels of benefit from having more than three tiles, but most work fine with the starter set.