Can think of a few things, used to blow up some of my old shitty Airfix models back in the day along with bottles of water (put a mini stick of dynamite in the water and put a golf ball on top and see how high you can get it)...
TPBM thinks blowing up Airfix models is sacrilege...
Never blew up a plastic scale model, but sent a few balsa/tissue flying models down in flames. It's more fun to set a
cherry bomb in a flying model using a lit cigarette to set off the fuse.