Third Grade Science Experiments (Page 49)

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Celebrate Lunar New Year and the Year of the Horse with these free science and engineering activities for enriching hands-on STEM. What is Lunar New Year? Lunar New Year (also known as Chinese New Year) begins February 17, 2026. Lunar New Year starts with the new moon that happens in late January or February. Celebrations continue for 15 days and culminate with a Lantern Festival. In Chinese culture, 2026 will mark the Year of the Horse. There are… Read more

20+ Next-Level Makerspace STEM Projects

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Level up your makerspace with these activities and STEM explorations for students ready to take next steps in robotics, circuit building, programming, electronics, and more! Take Your Makerspace to the Next Level! Our original jump-start your makerspace collection highlights 26 maker-inspired STEM activities to encourage and support hands-on creativity, engineering, and innovation. This new collection builds upon the original to feature 16 STEM activities to take your makerspace to the next… Read more

3D Print with Icing: No 3D Printer Required!

STEM Activity

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7 reviews

Are you wondering how a 3D printer works? In this fun activity, you will be the printer and make colorful 3D prints using royal icing. No 3D printer is required, and your prints are edible! Read more

7 Wearable Circuits Science Projects

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Explore cutting-edge electronics and engineering with wearable electronics science projects. From e-textiles and sewn circuits to personalize clothing and accessories to DIY wearables for health and safety, students can design, build, and test their own. Experiment with Wearable Electronics Wearable electronics, also called "wearables," are circuits and electronic devices that are designed to be worn. Devices like smart watches and fitness trackers are a familiar form of wearable, but many… Read more

A Juicy Project: Extracting Apple Juice with Pectinase

Science Fair Project Idea

Scientific Method

Do you know why enzymes are oftentimes called the workhorses of biochemistry? It's because they can speed up a wide variety of chemical reactions, and chemists and biologists use enzymes to do all kinds of jobs. In this project, pectinase, an enzyme frequently used in the food industry, will be used to extract juice from apples. Read more

A Really Long Straw

STEM Activity

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Have you ever used a crazy straw? Some spiral their way up. Others have fancy colors or decorations. Some are thin and others are wide. But just about all of them leave you sipping your drink from about the same distance. Why? Wouldn't it be fun to poke your head out of an upstairs window and secretly take a sip from a drink way below? Would it even be possible? With this activity, you'll see if you can set your own record for the longest working straw! Read more

Acid Rain and Aquatic Life

Science Fair Project Idea

Scientific Method

Chemicals from Earth's atmosphere are making their way down to the planet! Not in spaceships, but in rain. The acid rain can infiltrate ground water, lakes, and streams. How does acid rain affect aquatic ecosystems? Read more

An Aerobic Exercise: Yeast Metabolism with and without Aeration

Science Fair Project Idea

Scientific Method

This is a straightforward project on glucose metabolism in yeast. You will grow yeast under aerobic and anaerobic conditions and measure carbon dioxide output to assess metabolic efficiency. Read more

An Experiment on Seed & Fruit Dispersal

Science Fair Project Idea

Scientific Method

Up, up, and away! If you have ever made a wish and blown the fluff of a dandelion, you have witnessed how some plants are adapted to spreading their seeds using the wind. The tiny, furry parachute allows the seeds to be picked up by the wind and to be carried far away from their parent plant. In this experiment, you will make models of seeds and fruit to investigate dispersal by wind and to evaluate the relationship between the structure of the seed and its ability to be dispersed by the wind. Read more

Archimedes Squeeze: At What Diameter Does an Aluminum Boat Sink?

Science Fair Project Idea

Scientific Method

Where do you get your best ideas? At school with your friends? When you are out for a bike ride? Over 2,200 years ago, a scientist named Archimedes got one of his best ideas when he sat down in his bath. Eureka! He went running through the streets without even bothering with his clothes. What was he so excited about? He had discovered that when objects, like his body, are placed in water, water is pushed out of the way. Have you noticed that, too? The weight of the water that is pushed out of… Read more

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