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Construct and experiment with a periscope using reflected light rays to gather an image.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

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!

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

In this science fair project, students use the streak test to tell minerals apart from each other.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

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.

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.

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.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

This science fair project idea explores substances that cause a bubble to last longer.

In this project students experiment with making music using only glasses of water.

Make sourdough bread...and learn some colonial history and modern science in the process!

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

This science fair project idea explores whether talking to a plant will help it grow.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

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

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

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

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

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

In this experiment we will be determining whether birds prefer certain colors of seed.