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The Let's Do Chemistry "Build a Battery" activity lets participants learn how batteries work and how materials behave, change, and interact by building their own simple battery out of metal and felt w

In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.

In this activity, learners cut out 5 paper cards and label them with 1, 2, 4, 8, or 16 dot(s) to explore binary digits.

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

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

In this activity, learners build their own construction cranes using tongue depressors and pushpins.

In this activity, learners build water-propelled engines from soft drink cans.

In this engineering activity (page 2 of PDF), young learners investigate how a wide base can make a building more stable. Learners use blocks or boxes of different sizes to construct stable towers.

In this activity, learners participate in several full-body interactive games to model the process of self-assembly in nature and nanotechnology.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

In this activity, learners consider the water features they might enjoy at a community park--a pond, brook, water playground (or "sprayground"), or pool--and what happens to the water over time.

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

In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force).

Build a house you can fit inside, using cardboard tubes.

In this activity, learners build cars using syringes and water-powered hydraulics. Learners construct the car frame out of cardboard and set up a hydraulic system to raise and lower the car.

In this activity, learners investigate what happens when you build up static electricity on plastic balls.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.

This hands-on activity shows you how to build basic architectural shapes out of toothpicks and gumdrops.

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

This activity models the way Landsat satellites use a thermal infrared sensor to measure land surface temperatures.