Learn about endothermic and exothermic reactions and energy exchange by experimenting with temperature change in chemical reactions.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

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

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

After completing this fun science project, your child will have a better understanding of plants, and they may even develop a green thumb in the process!

Challenge your learner to design and build a city of their own in this creative engineering activity.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

This project will explore whether test subjects, deprived of points of reference, will, in attempting to walk a straight course, walk in circles.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

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

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Use popcorn in this tasty experiment to explore the five senses at home with your kindergartener!

In this challenge, students are tasked with creating an insulated cup that will keep beverages colder for longer than a regular cup.

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

Kids are sure to be entranced by the magic of the ocean when they create their very own ocean in a bottle.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

The goal of this project is to create an exciting topographical map out of dough.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

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

Show your child the solar system and let them explore the stars and space by creating a painting. It's a fun and easy way capture your child's imagination.

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

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

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.