Home Decorating Advice! I'm looking for some self adhesive wall art!?

I was watching HGTV the other nite and there was these, foam self adhesive group fo circles that where painted in a varitey of colors and stuck to the wall, and it was moveable you could re arrage them and make a new design. I have looked this up online and came up with wall pops and wallies...but I'm not a kid and I want something abstract, any ideas on an low budget art project like that? thanks a million! :)