This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Help cement the concept of place value with this simple activity that involves creating a set of dials made from Styrofoam cups.

Use this great no-bake recipe to save energy and keep cool.

This fill-in-the-blanks game is a little like Mad Libs, but for emerging writers. Get ready for some silly sentences!

This science fair project explores how salt and sugar affect the melting rate of ice in water.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

How do you turn an everyday object into a scary skeleton? This project is the perfect way to practice counting while using cotton swabs to create a skeleton.

This social science experiment endeavors to determine whether certain types of animals provide greater physical and mental health benefits to their owners.

This experiment explores how listening in to a one-sided conversation affects concentration.

This experiment observes inattentional blindness and investigates whether certain age groups or genders are more likely to demonstrate this phenomenon.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

Make a passport suitcase and keep track of all the places you've traveled together as a family. Here's how:

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

Do you think heat can affect a plant's growth rate?

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

In this activity, find out who the flowers' "partners in crime" are by being a flower spy!

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Determine whether the relationship between a personâs armspan and height are genetic.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

Determine which material produces the strongest static charge.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

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.

In this "paper and pen" science fair experiment, students will research the difference between standard time and astronomical mean time.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

Science fair project that determines which types of clouds are best at blocking harmful UV radiation.