Seventh Grade STEM Activities for Kids (188 results)

Train Wheel Science

STEM Activity

29 reviews

Have you ever watched a train roll by? If so, you might have wondered how the train is able to stay on its tracks. The secret lies in the train's wheels. Although they seem cylindrical at first glance, when looking more closely you will notice that they have a slightly semi-conical shape. (Of course, never get close to a working train!) This special geometry is what keeps trains on the tracks. In this activity you will put different wheel shapes to the test to find out why the conical wheel is… Read more

Use a Drop of Water as Magnifying Glass

STEM Activity

15 reviews

Are you ready to bend light, magnify letters, and have fun with drops of water—all while getting a glimpse into how lenses work? Lenses are the key components in eyeglasses, contact lenses, binoculars, telescopes, and magnifying glasses, just to name a few devices. With this activity, a homemade magnifying glass is only a drop away! Read more

A Candle Seesaw Balancing Act

STEM Activity

28 reviews

Do you love playing on a seesaw? Why is it that depending on where you sit on the beam, and the weight of the person on the other side, you either fly up into the air or fall down to the ground? And why is it so difficult to perfectly balance the seesaw? It can all be explained with physics! In this activity, you will investigate the balancing forces of a seesaw—with a seesaw made of candles! Read more

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Make String from Algae

STEM Activity

225 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

Build a Differential from K'Nex®

STEM Activity

10 reviews

What in the world is a differential and what does it do? A differential is a mechanism that helps cars go around turns without the wheels slipping. In this activity you will build your own working model differential from a building toy like K'Nex®! Read more

Build a Sandcastle That Can Support a Brick

STEM Activity

11 reviews

Can you build a sandcastle that can support a brick? Try it out in this fun STEM activity! Read more

Build an Ion Wind Rotor

STEM Activity

3 reviews

Can you use electrically charged "wind" to make something move? Find out in this fun project as you build your own ion wind rotor. Read more

Design and 3D Print a Snowflake

STEM Activity

37 reviews

Design and 3D print your own snowflake ornament with Tinkercad in this fun winter-themed STEM activity. Read more

DIY Face Mask

STEM Activity

13 reviews

To slow the spread of COVID-19, the CDC recommends wearing a mask or cloth face covering—particularly in places where it is impossible to maintain social distancing (staying at least 6 feet away from others). This recommendation is for everyone age two or older (children under the age of two should not wear masks). Many instructions to make your own mask are available online. This activity will help you think through the process of designing and making a mask as an engineering problem.… Read more

DIY Mini Drone: Motion Control

STEM Activity

12 reviews

Most modern smartphones and video game controllers have a built-in accelerometer used for motion control. In this project you will program an Arduino® to use an accelerometer to control the steering of a miniature popsicle stick drone. See this page for a complete list of our mini drone projects. You may wish to do the projects in order. Read more

Does Wet Hair Float or Cling?

STEM Activity

Have you ever noticed how hair moves freely when it is under the water, but clings together as soon as it emerges out of the water? Not only human hair does this; when wet dogs shake themselves after a swim, their hair clings together in strands. Try this activity to see why wet hair is far less fluffy than dry hair! Read more

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