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In this activity, learners create a kind of balance device using a wire coat hanger, some string, and paper cups.

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?

In this activity, learners explore density and buoyancy as they design and construct rafts.

In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.

In this activity, learners will build an air cannon out of simple materials you can find around the house. Although air is invisible to the eye, it is not by any means empty space!

This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.

Learners cover a bottle with a balloon. When they immerse the bottle in warm water, the balloon inflates. When they immerse the bottle in a bowl of ice, the balloon deflates.

In this math lesson (page 2 of the PDF), learners use bottles of various shapes to explore the abstract concept of rate of change.

Learners create a tool to measure how well they grip a wet object when their fingers are smooth versus wrinkly. Are smooth or wrinkly fingers better at holding on to the object?

In this activity, learners watch a video to learn about a couple who built a home out of shipping containers in Brooklyn, New York.

In this math activity related to volume, learners use problem solving skills to calculate and build a model house for Minus the dog.