This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

This science fair project idea explores substances that cause a bubble to last longer.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

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

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

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

The goal of this project is to create an exciting topographical map out of dough.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

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

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

In this CD hovercraft science project, students will construct their own DIY hovercraft.

This science fair project idea provides evidence that air is everywhere and takes up space.

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

Take advantage of the spring and summer sun in this arts and crafts activity that has your learner creating pretty flower prints.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This science experiment tests if dog saliva can really help heal wounds.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.