Maker Store has a new item, DIY Trippy RGB LED wave kit that will follow your hand movement and create waves of colors. Neat.
Imagine a bunch of little lights on a table, each about the size of a chess piece, each independent of the others. Arrange them any way you want. Each one continually, slowly changes colors on its own — but when you wave your hand over them, they create waves of colors that follow your hand
Here’s a video of the trippy RGB Kit in action: