Dan Welling e-mailed me the following:

This Sunday, September 13th, starting at 2pm, at Berry Park (401 Forby Rd, Eureka, MO 63025), a friend of mine has a group of kids (Scouts, church - don't recall) that are going to be flying water/air rockets.  My friend asked me if any of us would like to give a few minute talk on rockets and maybe bring some show and tell rockets.  

If anyone is interested let Dan Welling (danw1963@hotmail.com) know and he'll give you the contact info for his friend, Eric.