We are working on learning about atoms, molecules and matter. We started putting together a Buckyball today (better known as buckminsterfullerene)
What is a Buckyball? It is a carbon molecule made up of 20 hexagons and and twelve pentagons.
For more information about the Buckyball you can go here or here. There are even Buckyball toys but most seem to have been discontinued for some reason - it appears to be safety.
We had a lot of fun trying to make it and the kids ate some gummy bears but even though we didn't make it completely we learned a lot.