Chris Harrison's OmniTouch turns any surface into a touchscreen. The prototype uses a body-worn projection/sensing system to capitalize on the tremendous surface area the real world provides.
This is an A2 (16.5 x 23.4 inches) print of my unofficial world record for the most complex dot-to-dot drawing containing 6,239 dots. It is a high resolution scan of my completed original drawing - this is not available as a dot-to-dot that you complete. The print quality is fantastic - I think it looks better than my original. Thomas Makes Stuff — Mona Lisa 6,239