The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

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

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

The objective of this science project is to determine the length of time for different seeds to germinate.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

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!

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

This science research project challenges students to think of more effective lobster farming methods.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea determines the most effective method of preserving food.

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.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

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

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Plants and light seem to be good buddies, but how far does the friendship really go?

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.