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Learners set up books with rubber bands stretched between the books. When two identical books are stretched apart and released, they move back toward each other an equal distance.

In this activity, learners experiment and observe how the color of materials that cover the Earth affects the amounts of sunlight our planet absorbs.

Learners test their "light-smarts" by playing a game called "Light Quest!" The game board represents an atom and each player represents an electron that has been bumped into the atom's outer unstable

In this pencil and paper activity, learners work in pairs and simulate how astronomical spacecraft and computers create images of objects in space.

Learners make a skydiver and parachute contraption and launch it. They see that the drag created by air resistance slows the descent of skydivers as they travel back to Earth.

In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

Directed by instructional cards, learners kinesthetically model cell communication by acting as components in a cell signaling pathway.

In this design challenge activity, learners build a rubber band-powered rover that can scramble across the room.

If you have lights, cardboard, scissors, and some brass fasteners, you can make shadow puppets! Create a story-telling and design challenge for your learners with this simple and creative activity.

In this activity, learners write invisible messages on goldenrod paper, and make the message appear and disappear using acids and bases.

Learners identify an unknown liquid by comparing its behavior to known liquids. Learners drop liquids onto different surfaces and see how the liquids behave.

In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.