Hands-on library program interest?

Hey all,
Would anyone be interested in coming out to my library n Kenton County to teach a class for teens? I’m looking for something hands-on, techy, that will result in something the kids can take home with them. Any ideas? This program would be in March 2013.

How techy? Because with some of the simpler kits from Sparkfun, one could even go tweens.