Encourage your child to compare and contrast a wide variety of autumn-themed items by weighing various objects and recording their findings.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

This measurement activity uses feet to compare objects, but not the ones found on rulers and measuring sticks...the feet on your child's own body!

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

How powerful is the reaction between baking soda and vinegar? Find out here!

Invite your second grader to help you measure and mix these fresh, cool concoctions!

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Forget store-bought dyes this Easter: color your Easter eggs with natural dyes made with ingredients from your own kitchen in this 1st grade activity.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Get estimating with this spooky activity that asks your young mathematician to rely on their problem-solving skills to figure out how many items they believe are in spooky Halloween jars!

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Making metric conversions is a difficult concept to master. Get in some extra practice by playing this Tic-Tac-Toe game with your learner.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.