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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?

Child's Play

Age 7 to 11 Challenge Level:

How many faces can you place down into the hollows?

How many ways can you turn the pieces round?