Almost two weeks ago I saw this post. What really caught my attention was the tiny motor used to power the monorail. The video shows that it is circuitcubes, and it sounds like they sent out samples to several high profile builders. At any rate, the gerbil in my head quickly woke up and started franticly running on his wheel. I knew I needed one, so I pounced. Circuitcubes have two $40 sets, one with a dumb rechargeable battery box, motor block, and LED block, all 4x4x2. The other has a Bluetoot