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!

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

This science fair project idea identifies trees using a dichotomous key.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

This science project teaches students to classify different shapes of leaves.

Create a bee garden to help shelter bees in your area.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

Make a spring collage with your child to get them outside and those creative juices flowing!

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

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

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

In this science fair project, students make their own rain gauge to measure rainfall.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

This science fair project teaches students about wilting and browning of salad greens.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.