Found another paper steam engine "kit"
This one is not rated for live steam but seems to run nicely on compressed air. The model in the video has had an upgraded flywheel fitted, they actually rolled paper tubes for spokes. The stock kit has a Much more basic flywheel.
I did find a paper cardstock modeling company that will let you download all sorts of "textures" that can be printed on cardstock to make your own kits. There bricks and stone masonry textures are impressive and realistic looking. This basic kit was printed in 1986 and can be found in used book stores for as little as $5
Not trying to promote, just thought I would share.
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