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.

Race to double numbers in this competitive card game. Try one-digit or two-digit numbers, or more!

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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 determines if the size of the parachute will change the rate at which an object falls.

Money is a difficult concept to grasp. Help your kid get the hang of it with this pocket change triple Venn diagram activity.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Sharing can be a challenge, and division doubly so! Practice halving numbers in this competitive card game.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Engage your third-grader in this version of the classic game and she will get lots of practice using mental math to solve addition and subtraction problems.

This game reinforces the meaning of the term "multiples" and is fast enough to hold the attention of your fourth-grader.

In this social emotional learning activity, your child will learn about emotions and how they change, just like many parts of nature. Then they will spend time outside, exploring and reflecting on what they have learned.

This project compares the strength of one, two, and three-ply toilet paper.

Coil your daughter's two favorite colors into a wearable pendant with just a few scraps of felt!

In this activity, your child will experience multitasking, then mindfulness and compare the two in terms of productivity and calmness.

Help your child improve his coin counting skills in these two math games that have him race to reach $1.00.

Help your third grader create a Venn diagram fantasy creature by combining two different creatures to create a fantasy creature based on their similarities.

Your child can make a sweet and savory spinach strawberry salad; two ingredients that come together for a light and fresh summer dish!

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Compare fractions in this two-player math game. The objective of the games is to work together to determine who has created the largest fraction.

These easy-to-make felt friends are created by sewing two pieces of felt together with yarn and make great gifts for holidays such as Easter.

Most often, a collage is 2-dimensional, but instead of using paper as a base, this project uses an inexpensive pumpkin from the craft store.

In this activity, your child will write stories about two different people. The stories will include similarities and differences in the ways each person lives in their communities.

This science fair project idea produces varying pitches of sound.

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