3rd - 7th Grade Science Activities : Page 6

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Have your child kick off their summer vacation by making a miniature water slide!

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

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.

This science fair project idea determines if the color of light affects the growth of plants.

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

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

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

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Learn with makes water molecules work with this fun and easy science activity!

Some fossils have been been preserved for billions of years! Help your kid understand how fossils are created and preserved with this crafty project.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?