In this design challenge, your child will make a bottle rocket using typical household items.

Here is a nifty science experiment using Epsom salts to make "frost" appear on a piece of glass.

This science fair project idea determines if family members can recognize one another using only the sense of smell.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

Science fair project that examines condensation and the conditions needed in order for dew to form.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project idea provides evidence that air is everywhere and takes up space.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This project investigates the affect of storage temperature on microwave popcorn.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Examine the effect of pressure on carbonation in soda.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.