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Stack 'Em Up
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In this simple and fun activity, learners build a tower of cups to explore distribution of weight. Learners make predictions about their towers and test their designs.

Echo Base Bobsleds
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The goal of this activity is to build a miniature bobsled that is either the fastest or the slowest. Learners use recycled materials to design, build, and test their bobsled on a bobsled track.

The Thousand-Yard Model
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This is a classic exercise for visualizing the scale of the Solar System.

Foam Rocket
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In this activity, learners work in teams build and launch rubberband-powered foam rockets.

Building a 3-D Space Maze: Escher Staircase
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In this activity (page 95 of the PDF), learners create Escher Staircase models similar to those that were used by Neurolab's Spatial Orientation Team to investigate the processing of information about

Building with Wonderful Junk
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In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.

Roller Coasters
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In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.
Build A Hydrometer
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In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

Boats Afloat
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In this activity, learners discover what buoyancy is and determine the characteristics that make an object buoyant. Learners design, build, test, and evaluate boats made from a variety of materials.

Make Your Own Mini Mini Golf Course
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Build your own Mini Mini Golf Course and learn about hands-on building and design, basic circuitry, motion modules and more!

Crazy About Kites
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In this activity, learners build a kite out of paper, change it, and try to make it fly even better. With their new knowledge of kite making, students can then go on to create their own kite designs.