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Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

In this math lesson, learners design an experiment to model a leaky faucet and determine the amount of water wasted due to the leak.

Learners place water and part of an antacid tablet in a film canister. The reaction creates a gas reaction that launches the film canister like a rocket.

In this activity, learners will make predictions and experiment with different objects to see if they sink or float.

In this activity, learners investigate the properties of plastic bags. Learners find out what happens when they slowly push a pencil through a plastic bag filled with water.

In this optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

In the kitchen, learners can perform their own density investigation.

In this optics activity, learners explore how light bends and affects what we see.

Make a quick and easy filter from household materials. A filter will catch any solids suspended in a liquid and filter them out. By using a filter, learners can discover amazing things.

In this activity, learners make their own rock candy. Crystals will grow from a piece of string hanging in a cup of sugar water. The edible crystals may take up to a week to form.

In this activity, learners will experiment with different materials that can melt and change ice.

In this hands-on botany activity, learners sprout vegetables in film canisters.

In this activity about phase change and condensation, learners boil water in an empty pop bottle in the microwave.

In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it.

In this activity, learners make a foam packing peanut "flink"--neither float away nor sink--in water. Learners experiment with materials to make a Flinker that "flinks" for 10 seconds.

In this optics activity, learners explore color by examining color dots through colored water and the light of a flashlight.

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

In this activity, learners create a "mini sky" in a glass of water in a dark room.

In this activity about sea otters, learners make their own "otter whiskers" and use them to find objects underwater.

In this activity, learners turn an ordinary metal coat-hanger into a (very quiet) musical instrument.