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Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

Science fair project that examines oxidation, reduction and chemical indicators by testing for the presence of the iodide in salt.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Learn about what happens to a current-carrying wire in a magnetic field in this cool electromagnetism experiment!

Blend science and math to explore a very important first grade social studies question: does our planet contain more land or more water?

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Is our water polluted? Help your young scientist understand the importance of taking care of the environment with this simple experiment.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

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

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Are red apples really sweeter than green apples? The objective of this science fair project is to test the theory with quantitative evidence.

In this challenge, students are tasked with creating an insulated cup that will keep beverages colder for longer than a regular cup.

Evaluate the ability of a biodegradable dish detergent to increase the penetration of water in hydrophobic soils.

Give your child a chance to experiment with how things grow. And throw in something extra to up the fun factor even more...her very own grass pet!

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

Science fair project that compares leaf pigments of various tree species. Which tree species do you think will have the most pigments and why?

This science fair project explores different types of endangered frogs, and why some are endangered while others are not.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

This kindergarten science activity will help her explore the changing states of matter which transform an egg from raw to soft to hard-boiled.

The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

Science fair project that examines learn how the angle of incidence affects the efficiency of solar panels. How does a solar cell work?

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.