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Linkages
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This design challenge is an open-ended exploration of linkages, a group of parts connected by hinges, and the types of motion they can create.

Find the Fat
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Fat is a very important component in our diet. It's the most efficient source of energy in our bodies, and plays an important role in the flavor of foods.

Sound Charades
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In this game, learners create flash cards with an image on one side (of an animal, for example) and the sound that animal makes on the other.

CD Spinner
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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

Mystery Powders
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Learners are given mysterious white powders and have to determine their identity with chemical tests.

Formulas Poker
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In this adapted version of poker, learners practice writing chemical formulas by playing this chemistry card game.

Subtractive Paint Prints
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In this activity, learners of all ages will experiment with paint and printmaking.

DNA Modeling Activity
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Using pipe cleaners, straws, and beads, learners explore the building blocks of life by creating their own model of DNA.

Shape Up!
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In this activity (25th on the page) about learning and memory, learners explore a training method that animal trainers employ called "shaping." Working in pairs, learners will attempt to "shape" each

Ice Melt
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In this activity, learners will explore basic information about thermodynamics by experimenting with ice. Learners will compare ice melting rates on metal pans or plastic cutting boards.

Seismic Slinky!
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Did you know that a Slinky makes a handy model of earthquake waves?

Eddy Currents
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In this activity related to magnetism and electricity, learners discover that a magnet falls more slowly through a metallic tube than it does through a nonmetallic tube.

A Kazoo for YOU
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In this activity, learners will build an instrument from common household items. Explore sound through vibrations created by your vocal chords and captured by an instrument.

Secret Message
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In this activity, learners explore acid and bases as they create their own invisible ink out of baking soda and grape juice.

Decibel Cannon
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In this activity, learners will construct an air cannon as a model for the human ear.

Bonseki Salt Art
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In this activity learners will be creating art using a traditional Japanese art style.

Fast Rusting
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In this activity, learners conduct an experiment to find out if steel wool will weigh more or less when it is burned. Learners will explore the effects of oxidation and rusting on the steel wool.

Separating a Mixture
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This activity was designed for blind learners, but all types of learners can explore means of physically separating a mixture using dissolving, filtration, and evaporation.

Toilet Paper Solar System
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In this activity, learners build a scale model of the solar system using a roll of toilet paper.

Programming Languages: Harold the Robot
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In this activity related to computer programming, learners give directions to a "robot" (either an adult or another learner) and find out which instructions the robot is able to follow, and how their