3rd Grade Engineering and Science Inquiry Activities

Explore scientific concepts with this experiment that introduces kids to the scientific method!

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

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.

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

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.

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

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Learn all about balance and motion as your child designs a corn maze!

This science fair project idea investigates how color affects temperature.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

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!

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!

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

This project examines whether people's taste perception is influenced by what they see.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

This science fair project idea investigates how magnetism can defy the force of gravity.

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

In this activity your child will create their very own marble maze!

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

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

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

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

In this design challenge, your child will create a parachute for a small toy using typical household items.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.