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Construct-o-straws

Make a cube out of straws and have a go at this practical challenge.

Matchsticks

Reasoning about the number of matches needed to build squares that share their sides.

Little Boxes

How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?

More Building with Cubes

Age 7 to 11 Challenge Level:
You might like to sketch each stage as you picture the building in your head.