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In this activity, learners build a scale model of the solar system using a roll of toilet paper.

In this activity, learners create models of ionic compounds and observe the chemical formula of binary molecules they have created.

In this activity, learners use molecular model kits to construct familiar molecules like lactose, caffeine, and Aspirin.

In this activity, learners will explore engineering concepts to construct a blanket fort using materials sourced from home.

In this activity, learners use a simple 3D model to discover why the Moon has phases.

In this activity, learners will engineer a water irrigation system. Learners will create a ditch irrigation system -- or an acequia-- to move water with the help of gravity.

This activity introduces learners to the structure and properties of carbon nanotubes.

This fun and simple hands-on astronomy activity lets learners build a scale model of the universe with little more than adding machine tape.

Using simple materials from around the house and recycled materials, learners will engineer a grabber device to pick up and put down objects that are at least 12 inches away.

In this activity, learners will engineer a roof using simple materials to protect a construction paper person from a rainstorm.

Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.

In this activity, learners will use household items to design and build an elevator that will carry 2 passengers to a height of 16 inches...or higher!

Learners will explore the chemistry of mucous and its importance to our health by following a process to make their own replica "snot." The activity includes a time and age recommendation, a materials

In this activity, learners construct a model of DNA to better understand the structure of DNA and protein synthesis.

In this activity, learners investigate the basic crystal structures that metal atoms form.

In this activity, learners thread gumdrops together to make a model of a polymer.

In this activity, learners use pop-beads to understand the characteristics and properties of polymer chains.

In this activity (pages 7-16), learners model various crystal structures with LEGOs. This activity also contains additional links that explain how to create other crystal structures.

In this activity (pages 17-31), learners are introduced to techniques that are used to determine the structures of solid materials.

This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.