NASA's "After School Universe" program helps middle-school students with certain astronomy topics through the use of helpful videos. In this one, the concept of stellar fusion is shown through the use of clay balls and a tennis ball. Pretty cool to see how the lifecycle of a star evolves.
Now if NASA can post a video about how to unmerge the different color clay balls of Play-Dough once you've mushed them together. I guess that's the one on Stellar Fission.
Keith Shaw rounds up the best in geek video in his ITworld.tv blog. Follow Keith on Twitter at @shawkeith. For the latest IT news, analysis and how-tos, follow ITworld on Twitter, Facebook, and Google+.