We were in the car when Kieran said:
K: Mummy, a seesaw is a simple machine. The triangle thing, what is it called?
K: pivot. Correct!
K: and what is it called?
M: *I thought for a moment and thought that it is more rightly referred to as a fulcrum* so I said FULCRUM
K: yes! Fulcrum! Correct!
K: a wheel with a pencil inside is also a simple machine! You can roll it to move.
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