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Choose a recipe to double (or triple, quadruple, or halve). Show everyone the recipe and engage them in figuring out: How much will we need to increase the recipe to feed everyone?

This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

Learners create an Incan counting device called a quipu (pronounced kee-poo).

In this activity, learners will participate in a scavenger hunt involving sizes, shapes, and numbers. This activity works well with a whole group, individuals, or families.

In this activity, learners imagine what the world might look like if we could build an elevator to space!