LOL, I loved those things. We’d place em under the pegs of a toilet lid. When sat on, they blow and scatter sand on the back of the legs. Or lay em on the road for cars to drive over. Boom, flat tire? Great fun!!
I had a little steam engine. Add water, add a little fuel cake and light it, after a couple minutes, that engine was a screamin driving a piston and wheel faster than ever. Blow the steam whistle. A nice hot little boiler bomb. No shields, no nothin.