This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This science project teaches students to classify different shapes of leaves.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Word color association is just a fancy way to talk about the way we connect colors with words.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

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

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science fair project idea determines which method of hand cleansing is the most effective.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

In this activity, your student will be invited to build a chair out of building blocks that is designed to meet the specific size and shape of a small doll or toy figure.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science fair project teaches students about wilting and browning of salad greens.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.