ok, other things to buy...
http://www.thinkgeek.com/geektoys/science/907a/
http://www.thinkgeek.com/geektoys/science/9781/
http://www.thinkgeek.com/geektoys/science/c192/
http://www.thinkgeek.com/tshirts-apparel/interactive/a090/?cpg=froogle
http://www.thinkgeek.com/tshirts-apparel/interactive/8a5b/
http://www.thinkgeek.com/tshirts-apparel/interactive/ac0b/