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Showing Results for adding subtracting

Most parents probably wouldn't mind subtracting 8-9 years off their age. Here's a fun third grade subtraction activity that may do just that.

Subtraction Action

Try adding a splash of color to editing and revising with rainbow editing.

Rainbow Editing

Take play-dough to the next level with this homemade recipe, adding surprising ingredients perfect for summer!

Sand Dough

What happens when colored beams of light mix? You might be surprised.

Adding Colors: An Optical Experiment

Transform ordinary metal paper clips into wearable jewelry by adding beads and linking the clips together.

Paper Clip Bracelet

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Does Adding Salt to Pasta make it Cook Faster?

This science fair project idea examines whether adding gelatin causes a solid  to have a higher melting point and/or melt slower.

Does Gelatin Slow Down the Melting of Freezer Pops? 

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Factors Affecting Solubility

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

The Chemistry of Dyeing Easter Eggs

Add negative and positive numbers in this fun math card game for fourth graders!

Build & Take

When it comes to money it isnât enough to know how much one coin or bill is worth. Make it all come together for your kid with this shopping activity.

Money Math: Shopping for Understanding

Learn all about cause and effect as your child experiments with an exploding pumpkin in this engaging fall activity! Get the whole family involved with this simple science experiment that is a fun and exciting way to combine Halloween and science.

Make an Exploding Pumpkin 

Help your second grader to a better understanding of how to count and represent money with age old game of tic-tac-toe.

Money Tic-Tac-Toe

Forget mass-produced, store bought holiday ornaments. Your fifth grader can usher in the holidays by making his own homemade marbled Christmas balls!

Make Marbled Christmas Balls

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!

Watch Acids and Bases Produce Colors!

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Can Jell-O be Made With Just Warm Water Instead of Boiling Hot and Then Cold? 

In this activity, your child will get a review of addition, subtraction, multiplication and division using classic domino pieces.

Play Domino Deal for Math Review!

Build your child's math skills with this 2nd-3rd grade activity. Similar to a carnival toss, this egg carton toss game is sure to provide hours of fun.

Egg Carton Game

This science fair project will help students learn about non-vascular plants, such as mosses.

Water and Mosses

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Floating Balloons

Nothing beats homemade salsa from scratch! You and your child can concoct a healthy and flavorful condiment to compliment any summer dinner.

Black Bean Salsa

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

Can superabsorbent polymer crystals absorb any other liquids besides water?

This fragrant drawer sachet keeps clothes smelling sweet, and makes for the perfect gift.

How to Make a Scented Sachet

Help your child learn healthy eating habits by transforming every kid's favorite food into a healthy, flavorful after-school snack.

Bake Pizza Muffins

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

What is Mulch?

Draw your own beautiful mandala with this easy technique that ensures symmetrical results every time!

Draw a Mandala

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

DIY Compost: Aerobic and Anaerobic Decomposition

Make environmentally friendly, chemical-free toothpaste using one of the most common, inexpensive pantry staples in the American kitchen: baking soda.

Make Baking Soda Toothpaste

Science fair project that examines condensation and the conditions needed in order for dew to form.

Dew Point, Humidity and Weather

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

Density Demonstration

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