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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?

Chairs and Tables

Age 5 to 7
Challenge Level

Remember your chair must fit neatly under the table with enough space for an imaginary "person" to sit down.
Have you counted how many cubes you used for each leg of the chair? Might this help?
How about counting the number of cubes along the seat of your chair?