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Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell.

This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

In this activity, learners discover if carbon dioxide has an effect on temperature.

In this quick activity/demonstration about density, learners examine what happens when two cans of root beer--one diet and one regular--are placed in a large container of water.

In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.

In this chemistry demonstration, learners investigate the factors that increase the rate of dissolution for a solid.

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

In this activity about computer programming, learners follow instructions in a variety of ways in order to successfully draw figures.

In this chemistry activity, learners observe a combustion reaction and deduce the components necessary for the reaction to occur.

Is a square stronger than a triangle? Use tongue depressors to build simple shapes. Then apply a little weight to them and see what happens!

This magic trick is based on how computers detect and correct data errors.

In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

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

In this demonstration, learners attempt to get a large coin through a small hole, the size of a smaller coin.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

This simple activity uses paper and scissors to convey two key concepts to learners: the nanoscale is very small and working on the nanoscale requires special tools.