Perhaps a speed event. Provide maraboo, hackle, chenille and a hook and see who can tie a couple of wooly buggers the fastest. This can be done in heats, so that you have a bunch of little races. Perhaps groups of four, with the top two moving on to the next heat. Or it can be done based on time. I dont know how many participants you will have, but I am sure you can taylor it to your needs.

Sounds like a fun club.

Have fun, Jeff

and let us know what you end up doing.