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2nd - 4th Grade Science Projects Activities

Use pepper and soap to discover some fun facts about the properties of water.

Pepper and Soap Experiment

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Bouncing Ball Physics: What is Elasticity?

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old &ldquo;why&rdquo; questions. As you walk with your child, you can encourage them to ask questions.

Inspire Simple STEAM Exploration

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets&#39; relative size!

Scale Model of the Solar System

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Self-Inflating Balloons

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.

The Limewater Carbon Dioxide Test

This science fair project idea experiments with spinning color wheels and optical illusions.

A Trick for the Eyes: Color Wheels and Optical Illusion Tops

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

A Single Movable Pulley and Mechanical Advantage

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

How to Inflate a Balloon Using Baking Soda and Vinegar 

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Third-Class Levers in the Human Body

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Duck Feet

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

Talking to Plants

This science fair project idea  determines what household items are good conductors of electricity.

Conductor or Insulator

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

Pineapple Enzyme

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.

Ocean Food Web

Take a dive into the candy jar with this yummy science experiment.

Candy pH

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Testing the Solubility of Common Liquid Solvents

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Floating Paper Clip

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Capillary Action Experiment

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Fruit Fly Life Cycle

In this science fair project, students make their own rain gauge to measure rainfall.

DIY Rain Gauge

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Forest Food Pyramid Project

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

Which Gum has the Longest Lasting Flavor?

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Animal Vision: Ocelli, Compound Eyes, and Camera Eyes

Start your toy engines -- this is going to be a fast and friction-filled race!

Car Friction: The Science of Going Fast

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Like Oil And Vinegar

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

How to use Colored Filters to Send Secret Messages

This science fair project idea  develops an understanding through experimentation of which shapes are the most structurally strong.

Bridge Project

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Dog Nose Prints

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Create Your Own Earth Model

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