Windmill experiment.

It was windy outside this week so First Class built windmills today to investigate whether a small or a large wheel spins faster.

After some discussion, a little bit of tricky construction and Mr. O’Sullivan poking his thumb with a pin six times, they tested the spinners outside.

The wind was strong enough to spin the big one 13 times in a minute but the small one was too fast to count!

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