Ideas for Principle #29

💡 Pool floats or an inner tube in the pool - filled with air so we can float on them and not sink in the pool.

A bouncy castle - filled with air so we can jump on it.

A windmill - uses air so the blades move and turn the mill.

A flour mill - uses flowing water so the giant wheel moves and grinds the flour.

Is it hard for you to lift or move a heavy, rigid object?!
Solid, heavy materials don't move easily.

Worth thinking: can you use air or water instead of a rigid material, to make it easier to move or inflate?

Air and water flow easily and adapt themselves to any shape - which is why they can move things gently and without effort.