We downloaded a template of a tetrahedron from the internet. A tetrahedron is a symmetrical 3D shape made up of 4 identical triangles. We produced 11 of them. Our tetrahedrons attract each other by having magnets glued inside them. They will therefore also stick to a steel base. We made use of that when we went outdoors and played a fun game: throwing the tetrahedrons onto a steel target plate. They didn't always stick!
When we got home we combined our tetrahedrons into a mobile.
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