[sammyg2]

Brings back memories.
When I was about 10 years old, I wanted to enter a science fair.
I worked with my dad and we (he) built a working reciprocating engine out of clear plastic and brass. Don't remember exactly what kind of plastic, but it was scraps left over at his work and was "new" to industry which added to the cool factor. Some new type of acrylic.
He made the engine on a lathe and mill at work after hours and it was trick. Even had a big brass flywheel.
We snagged a compressor out of an old refrigerator and got it to compress air and that was used to power the engine for demonstration purposes, as a functioning boiler prolly wasn't a good idea at school.
My job was to design the display and do the actual presentation.

I sure wish I still had that little engine. Of all the things that remind me of my dad that's the one I really wish I could get back.