I plan on running the All's Quiet on the Ruritanian Front game at Historicon. I decided to give the Americans a little more support. I've always liked the interwar concept Tumbleweed or Ball Tank:
RAFM just produced a version of the Tumbleweed Tank
Unfortunately, it's only in 15mm and I game exclusively in 28mm. So I decided to build my own. Here's my attempt:
It's made out of a toilet bowl float (never used!) and a couple of dome-shaped tops from Bionicle containers. The machine guns and tank gun are from old plastic toys and attached bits of sprue as the dirt-grippers. My son did the markings free-hand.