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First Grade STEM Activities for Kids (173 results)

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Build a Mini Trebuchet
STEM Activity
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455 reviews
You probably know what a catapult is. In the Middle Ages armies would use them to hurl stones at castle walls. But did you know about an even bigger type of medieval siege weapon called a trebuchet? Try this project to build a miniature version! Read more
Erupting Diet Coke® with Mentos®
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295 reviews
Have you ever seen the Diet Coke® and Mentos® experiment, which is all over the Internet, and wondered what makes the reaction work? You might think that there is some ingredient in a Mentos candy causing a chemical reaction with the soda, like the way baking soda reacts with vinegar. But the amazing eruption that takes place when Mentos are dropped into Diet Coke is not a chemical reaction at all! Instead it is a physical reaction. That means that all of the pieces of the reaction… Read more
Build a Rubber Band-Powered Car
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577 reviews
Admit it, you've probably launched a rubber band at least once—pulled one end back, and let it go flying. Did you ever suspect that rubber bands could also be a fun way to learn about physics and engineering? Find out in this project where you'll build a rubber band-powered car. Read more
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Make String from Algae
STEM Activity
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213 reviews
Did you know that the seaweed you've seen in the ocean or even eaten as a snack is inspiring innovators to imagine new materials? Large brown algae, like kelp, contains polymers—long chains of molecules—that are more environmentally friendly than the ones in most plastics. These natural polymers (alginates) could eventually be used to create sustainable everyday objects. Try your hand at using a bit of chemistry to turn biodegradable polymers from algae into your own custom… Read more
Make a Cotton Ball Launcher
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476 reviews
Have you ever stretched and launched a rubber band at someone? Put that energy to good use and build a rubber band-powered cotton ball launcher in this fun activity! Read more
Make Your Own Harmonica!
STEM Activity
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292 reviews
Can you name the bestselling musical instrument in the world? If you said harmonica, you are right! The harmonica was said to be patented in 1821 by Christian Buschmann, a 16-year-old German boy. Since then, it has become the top-selling instrument in the world and a household item in many places. Luckily, creating beautiful noise is not just an art—it is also a science! In this activity, you will design and explore your own harmonica-like instrument made from household items. Time to… Read more
Walking Water
STEM Activity
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220 reviews
Imagine this challenge: You have two glasses of water—one empty and one full. You want to pour half of the full glass into the empty one. The twist? You aren't allowed to pick up either glass! Can you get the water to "walk" between the glasses using nothing but a paper towel? Try this activity to find out! Read more
Explore Glow-in-the-Dark Water!
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205 reviews
Have you ever been fascinated by things that glow in the dark? It can be a lot of fun to play with bracelets, wands, and other toys that are glow-in-the-dark, like some stickers and creepy, crawly, plastic insects! Have you ever wanted to make something at home that glows? It turns out that it is not that hard to do — all you need is tonic water and a black light! Some common household chemicals can also affect this beverage's glow. In this science activity, you will make tonic water glow… Read more
Build a Wind-Powered Car
STEM Activity
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357 reviews
Is that a sailboat or a sail...car? Design and build a toy car powered by the wind in this fun engineering project! Read more
Build a Mini LED Lightsaber
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141 reviews
Build your own mini LED lightsaber with a straw in this quick Star Wars-themed STEM activity. May the Force be with you! Read more
Make Magnetic Slime
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364 reviews
What happens when you add iron filings to regular slime? You get magnetic slime! Make your own magnetic blob that will swallow up a magnet in this fun experiment. Read more
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