She explains density with common household items such as oil, syrup and water. She also uses glasses filled with water to show how sound waves travel and explains water displacement with a watermelon and a bathtub. Density Pour equal amounts of cooking oil, syrup and water in a tall cylindrical container. Sound Waves Use water, glasses and a spoon to demonstrate how sound is affected by the distance it has to travel. Let children tap lightly on the glasses with a metal spoon to discover how each glass produces a different tone.
Distances Help children learn a basic math skill, estimating distance, with a simple trundle.
Make a trundle with a wheel that's one yard in circumference, and mark the wheel with a bright red arrow. Each time the wheel makes a revolution, one yard is marked off. Soon they'll acquire the important skill of estimating distances. Displacement Help illustrate math and science concepts with an interesting story. For instance, tell a child the story of how Archimedes discovered the principle of water displacement and demonstrate it by using a bathtub.