Grades 3-5

Thinking in Three Dimensions

Thinking in Three Dimensions

What do books, posters, TV screens, and computer monitors have in common? They all render our 3D world in 2D. Playfully explore the third dimension by building an origami waterbomb.

See the Light

See the Light

Light always travels in straight lines—that is, unless it bends or bounces off an object's surface. Take an enlightening look at light with these three easy experiments.

Einstein in Time

Einstein in Time

Considered a genius by the world, Einstein once said, "I have no special talent, I am only passionately curious." Take a quick look at where Einstein's curiosity took him—and the world.

Atomic Mobile

Atomic Mobile

All living things contain carbon, the sixth element on the Periodic Table. Make a mobile of this elemental element with scissors, wire, pipe cleaners, and clay.

What's the Big Idea About Marine Biology?

What's the Big Idea About Marine Biology?

How is the ocean like a layer cake? What cool and spooky creatures live there? And just how important is the ocean to humans? Dive deep into marine biology with this kid-friendly introduction.

Create a Coral Reef

Create a Coral Reef

Did you know that, at their core, coral reefs are the skeletons of thousands of dead coral? Make your own coral reef diorama—with pasta, Play-Doh™, pipe cleaners, pom-poms, and hair curlers.

Be an Ocean Helper

Be an Ocean Helper

Even if you live nowhere near the water, there are some simple ways you can help protect the oceans. What are you already doing to help? And what activities should you add?

Rubber Blubber Gloves

Rubber Blubber Gloves

If you've ever dipped your toes in the ocean, you know the water can be downright chilly. So how do whales and walruses manage to stay warm in frigid waters? Find out with this fun hands-on activity.

Slowing the Flow

Slowing the Flow

All mammals—dogs, sea lions, and even you—have an adaptation for surviving in cold water. Take the plunge, and learn why the mammalian diving reflex is your cold-water friend.

Test Density with a Supersaturated Solution

Test Density with a Supersaturated Solution

You know that oil and water don't mix, but what about salt water and fresh water? Find out firsthand with this kid-friendly experiment that examines both salinity and density. 

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