It is Worldwide Dungeons and Dragons Gameday today, and lots of people are playing. But here is a prototype of a toy I would like to start playing with. It is built with off-the-shelf parts totaling about $350; a camera, a small projector, a cell phone, and some colored plastic or tape for your fingers. But it combines them for functionality we have never had before, and in production it would cost around $100. They are calling it the Sixth Sense, and it is the first wearable computer I have seen that turns your environment and the things in it interactive. This project is from the MIT Media Lab, one of many they are developing to invent a better future. Thanks to Technology Story for the heads-up on that one.