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dynamite crate
This was made for the Sand Rover, but uncut it could stand on its own.

If you have a bit of luggage space in the back of your beach buggy, you would obviously put a crate of dynamite there.

This one has the inventor's label.

This is made from lolly sticks on a couple of 10.5mm stripwood struts. The colour is Tetley brown!

A diagram is here.