What are some practical uses for Nanotubes and Buckyballs?

Question

Any uses for Nantubes and Buckyballs as well as other fullerenes appreciated.

I plan on presenting this information to a group of young (around 12 years of age) students, so no overly complex stuff, although high school and 1st year Uni chemistry theory is OK.

You will be credited for your information and thoughts

Answer 1

since they are low density materials,they can be used for many metallic applications. they are relatively stronger than iron and be used for certain adhesion purposes.

Answer 2

The cool thing about nanotubes is they can be used for just about anything.  Much lighter than steel, and hundreds of times stronger... the applications are endless.

My favorite is the space elevator.