We made an 🌪anemometer🌪 with which we can measure the wind speed according to the number of rotations of the device in 30 sec. (cups)
We also made a hygrometer with which we can measure the humidity of the air - when the air is humid, the cone shrinks to protect its seeds and the straw is higher, when it is drier - it dissolves and the straw moves down. Our two measurements for the day are two hours apart.
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