How to create an atomic model?

Ok, so Im going to Wal-mart is 2 hours!! My project is due tomorrow and I have to make a 3D model of an atom. I have no idea what to use, except maybe pipe cleaners and styrofoam [did i spell that correctly??] Anyways .. Im pretty sure everyone else is using the s-. Except one boy who used Plastic easter eggs. I want something creative and unique like his!!! =[ Except of course, BETTER!! Help! 2 Hours, yo!!