Nothing really if you want to buy a projector, Kinect, computer and install/configure/write your own software. I don't know a lot of four year olds doing that these days.

As I stated in a previous comment: $40 software x 4000 installs = $160k. Hardware sold by other companies to bring cost per install up to $10k. If you look at their website, they only sell the software.

$40 software x 4000 installs = $160k. Hardware sold by other companies to bring cost per install up to $10k.