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Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.

In this activity, learners explore a surprising method for calculating the mathematical constant pi, known as Buffon's Needle.

Combine math and exercise with this activity. Learners count how many times in a row they can skip rope or throw and catch a ball.

Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

This is a deceptively simple game to teach strategy, planning, and pattern analysis. In this game, learners take turns removing tokens from a board, and develop a plan to take the last piece.

In this activity, learners will estimate how many seeds are in a fruit or vegetable, then count to find out. The result: mix estimation with healthy eating.

In this activity, learners use a string and pair of scissors to find pi in the world all around them. Take the circumference of a round object with string and cut the string to that length.

This three-part activity shows learners how to build three meteorology tools: a wind vane, a rain gauge, and a barometer.

This is a quick game about self-assembly (page 2 of PDF under Self-Assembly Activity). Like the molecules of DNA, learners will self-assemble into a pattern by following a simple set of rules.