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This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Find out whether putting something on top of a plant will inhibit its growth.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

This science fair project idea investigates whether plants can survive being frozen.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

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.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.