Preschool - 4th Grade Engineering and Science Inquiry Activities

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

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

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

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.

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 idea explores the different properties & interactions of sugar molecules.

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

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.

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.

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

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

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.

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

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

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

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

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!

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.