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Tangrams

Can you make five differently sized squares from the interactive tangram pieces?

Baked Bean Cans

Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?

Three Squares

What is the greatest number of squares you can make by overlapping three squares?

Animated Triangles

Age 5 to 7
Challenge Level
How is the starting triangle split? Can you cut your own triangle in the same way?
What happens to the new shapes then?
You can always pause the film at any point so you can look carefully at the images.