by David Shaw, 14 October 2021 | 0 comments
This weird, wonderful shape is called a sphericon and it has a strange way of rolling. It wiggles back and forth as it trundles downhill!
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by David Shaw, 5 September 2019 | 0 comments
Normally, when you blow on a piece of card, it flies away. But in this activity, you can blow to pull the card towards you with the science of air pressure!
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