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Conversation Piece
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Focus sound through a balloon! In this Exploratorium activity, you'll use dry ice to create a balloon that's a sound lens.

School of Fish
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In this activity, learners will make fish cutouts that propel through the water with the help of surface tension.

Properties of Dust
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In this activity, learners carry out a scientific investigation of dust in their classroom. Learners produce an analysis on graph paper of the dust they collect over the course of a few days.

Does it Stick?
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In this activity, learners will observe magnetic properties and sort objects by them. This activity uses everyday items to teach learners about magnetic forces, poles and properties of magnets.

Invisible Ink
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In this hands-on activity (on page 2 of the PDF), learners experiment with lemon juice and paper to create a message that can only be revealed using chemistry.

Our Place in Our Galaxy
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In this fun and simple hands-on astronomy activity, learners construct a model of our place in the Milky Way Galaxy and the distribution of stars, with a quarter and some birdseed.

Convection Demonstration
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In this quick activity (located on page 2 of the PDF under GPS: Balloon Fiesta Activity), learners will see the effects of convection and understand what makes hot air balloons rise.

Feel the Heat
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In this design challenge activity, learners design and build a solar hot water heater. Their goal is to create a heater that yields the highest temperature change.

Pipes of Pan
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Create an instrument that you don't play--you just listen to it through tubes of various lengths.

Afterimage
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In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least 30 seconds an

Falling Rhythm
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Listen to the beat of gravity. By taking two strings with weights tied to them at different, yet uniform intervals, you can hear the uniformity (and rhythm) of gravity's accelerating pull.

How Do We Convert Mechanical Energy into Electrical Energy?
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In this activity, learners use a compass, powerful magnet, and copper magnet wire to build a special generator known as a dynamo.

Water Exploration Station
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In this activity (located on page 3 of the PDF), learners investigate the way water moves and how we can control and direct water.

Tie Dye Painting
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This is an activity exploring color and color mixing.

Magnetism Hunt
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In this activity about magnetism (page 4 of the PDF), learners will experiment with magnets and different objects to find out that not all metals are attracted to magnets.

Black Holes: No Escape
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This fun and simple hands-on astronomy activity lets learners experiment with marbles and weights to discover some basics about gravity and black holes.

Float Your Boat
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In this physics activity, learners will explore buoyancy.

Garden Poles
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In this activity, learners build large-scale structures and cantilevers in a series of "building out" challenges with garden poles and tape.

COSI's Bubble Recipe
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Everybody loves bubbles, and this is the best bubble recipe ever!

Stem Cell Differentiation Game
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This game uses a modified Uno deck to review concepts related to stem cell research and diabetes.