Cameras and wands may be the game controllers du jour, but it seems there's still room in the world for virtual reality experiences a bit more concrete -- like these buckets, filled with water, that let their user physically paddle through a digital dreamscape. "Channels" uses a pair of flex sensors attached to plastic spoons to monitor the flow in each bucket as a projector throws the minimalist 3D environment up on a nearby wall. Meanwhile, "Cadence Chair" uses an antique rocking chair outfitted with an accelerometer to align ribbons of light, and if you do it in the right rhythm it plays a hidden video. Both are
