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Build your own version of a favorite carnival game, in which a marble races down a maze consisting of rows of nails.

The goal of this activity is to design, build and test a house or toy for an animal.

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

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

In this activity, learners rotate through several learning and play stations to explore dinosaurs and paleontologists.

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

In this activity, learners construct a device that allows them to view 2-D images in 3-D.

This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

In this three/four-day lesson, learners calculate perimeters and areas and draw the castle plan to scale.

In this math lesson, learners explore the concept of using units to measure length. Learners first read "How Big is a Foot" by Rolf Myller and learn about units.