As a starter skit for the boys I would go to www.macscouter.com and look at "Walk Ons". Most of these are silly, one liners that don't take much practice.
The boys always enjoy seeing their parents put on the spot, plus they need to see parents getting involved in the fun. My favorite skit is "The Story of Running Deer" where I call unsuspecting adults from the audience (parents and leaders) and I read the story requiring them to act out certain parts. There are many web sites that have this skit. The following site seems to have a good variety of skits.
http://www.scoutxing.com/skits/skitsdefault.htm
Anyway, have fun!