I've ordered a couple of Geico caveman hand fans to take to the convention and to wave around during the Howdy Party!
They're only 50 cents each, so if you are interested in buying some for yourself before you head out, here's the link:
http://geicostore.summitmg.com/geicostore7/product.asp?pf%5Fid=G%2D7051&dept%5Fid=7000#desc
If nobody else buys any, my daughter and I will be the ONLY people waving them (and keeping cool).