I had to make something out of a sad cardboard box my wife was about to throw away. After her usual “Oh No” I took the box , checked the internet for ideas, and discovered many references about Pop Pop Boats and scratch built one for display at the September Ship Modelers Association meeting.
Protective soda can aluminum lined the interior after constructing the soda can aluminum boiler.
Big smile when this cardboard boat POP POPPED along our water filled kitchen sink.
How to Make a Pop Pop Boat:
https://www.youtube.com/watch?v=uBEXCZ0Ry60
BP