This interactive LED light floor moves with you.

This video shows off a really cool interactive floor that uses a combination of LED lights, infrared sensors, and weight sensors.  This combination of technology makes for a really fun product with interactive animations.

As people walk around the floor, wave their hands, and move in various ways, the floor can 'shoot' light all over the floor and send waves of color throughout the entire screen.

This would be a great 'time waster' in a hotel lobby or in front of an entertainment venue.