Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Challenge your learner to design and build a city of their own in this creative engineering activity.

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.

In this activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

This science fair project idea explores how length affects the weight a bridge can hold.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

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

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot initiate a domino effect.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

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

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.

A twist on the gingerbread house, this train is made with graham crackers, icing, and candy decorations. A great 2nd-3rd grade holiday arts and crafts activity.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.