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

Okay, identifying place value isn't as fun as eating ice cream, but with a few index cards and a competitive spirit, it can be disguised a game!

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.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

This science fair project idea identifies trees using a dichotomous key.

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.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

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

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Many kids find themselves especially challenged by writing in third grade. Here's how you can help, using a technique called "storyboarding."

In this activity, your child will use two powerful questions to investigate a thought and the truth behind it. They will write and perform a skit using mindfulness and these important questions.

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

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

This variation of Duck, Duck, Goose is played in pairs, which means a lot more activity for participants!

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

Young artists will combine two animals into one in this imaginative art-project-slash-game!

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

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

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

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

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

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Introduce your fifth grader to the Kinara, part of the Kwanzaa tradition, by playing this fast-paced, two player game!

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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

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.

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

Introduce your fourth or fifth grader to volume by having him build rectangular prisms, and then count each sugar cube to check his volume calculations.