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In this activity, learners discover that some things only stand up while they are spinning.

In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.

In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

In this activity, learners build mini catapults using paint paddles and a spoon. Use this activity to introduce learners to forces and projectile motion.

In this activity, learners create 3D geometric shapes using straws and pipe cleaners.

In this activity, learners build and play three math games. In the first game, called "Switcheroo," learners place marbles in holes 1 through 4 and 7 through 10.

In this activity, learners construct three math puzzles out of simple materials like wood, string, and Styrofoam.

In this activity, learners build unique yo-yos, which spin round and round without moving up and down.