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In this activity (last activity on the page), learners make a model of the eardrum (also called the "tympanic membrane") and see how sound travels through the air.

No glue is needed for learners of any age to become marshmallow architects or engineers.

In this engineering activity, learners construct sturdy geodesic structures out of gumdrops and toothpicks. Use this activity to explore engineering principles as well as sturdy shapes and triangles.

This is a classic exercise for visualizing the scale of the Solar System.

In this activity, learners use things from the kitchen as building materials to explore how shapes contribute to the strength of different structures.

In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.

In this activity, learners explore atoms as the smallest building blocks of matter. With adult help, learners start by dividing play dough in half, over and over again.

In this activity (on page 14 of PDF), learners use a pan full of flour and some rocks to create a moonscape.