How many of me?
Measure a tree trunk with parts of your body, such as your arms or feet. Or if the tree is really big, with your whole body.
Time needed: 5 minutes

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- Park
Go further
Measure a tree shadow with your body at a different times of the day. Does the length of the shadow change?
Did you know when the Sun is lower in the sky in the afternoon, you'll have a long shadow whereas when the Sun is above you at midday, you'll have a very small shadow?
All done?
Time to uncover a fact or joke.