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Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Learn about Ikebana, or the Japanese art of flower arranging, with your child while artfully arranging spring flowers!

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Create your own cloud with an activity that will explain how important concepts such as evaporation, condensation, and precipitation work.

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!

This Valentine's Day, pair up science and crafting with this simple crystal formation project that's sure to bring a little love into your home.

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

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

Make all-natural dye from vegetables to create gorgeous homemade play-silks!

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

Is your child a nature nut with an eye for creative, green-friendly projects? Introduce them to this amazing DIY bird feeder!

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.