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Springs and Stomachs
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In this demonstration, learners investigate mass, gravity, and acceleration by dropping a wooden bar with a balloon attached to its underside, a mass suspended from it by rubber bands, and a sharp-poi

Release the Grease!
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In this simple activity (on page 7 of the PDF), learners use water and liquid dish detergent to see which one removes lipstick better from an index card.

Mystery Matter
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This interactive demonstration reintroduces learners to three states of matter (solid, liquid, gas), and introduces them to a fourth state of matter, plasma.

Tiny Pants Photo Challenge
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In this activity, learners use a simple trick of perspective to dress friends in tiny cutout clothing. Learners make tiny pants out of card stock and tape them to the end of a stick.

What's in Your Blood?
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Doctors often send a sample of blood to a lab, to make sure their patients are healthy.

Solar Convection
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In this activity, learners add food coloring to hot and cold water in order to see how fluids at different temperatures move around in convection currents.

Rockets Away
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In this activity, learners build a simple "rocket" with ordinary household materials to demonstrate the basic principles behind rocketry and the principle of reaction.

Resonant Rings
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Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces.

Metal Noise Maker
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In this activity, learners explore how sound travels through solid objects better than through air. Leaners attach a metal clothes hanger to a piece of string and hold it to their ears.

Electrostatic Water Attraction
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In this activity, learners conduct a simple experiment to see how electrically charged things like plastic attract electrically neutral things like water.

Density Rainbows
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In this activity, learners explore the concept of density by pouring 5 different liquids into a jar. Food coloring is added if needed to give each liquid a distinct color.

Sock It To Me
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In this activity, learners discover how sweating makes us feel cooler. Learners put on one damp sock and one dry sock and sit in front of a fan.

Laser Jello
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In this activity, learners use gelatin as a lens to investigate the properties of laser light.

Spinning Cylinder: Make a triangle appear on a spinning wheel
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Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.

Coffee Filter Rainbows
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In this activity about color, learners get to explore the process of chromatography. Right before their eyes, they can watch ordinary green and black ink turn into a literal rainbow of colors.

Inertia Coin Stack Challenge
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In this activity, learners experiment with inertia by performing an easy and hands-on investigation with a playing card and a stack of coins. The activity includes an accompanying Mr.

Polar Opposites
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In this activity, learners make a 3-D model of magnetic fields by inserting a small, strong magnet into a sphere.

Bernoulli Brain Teasers
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In this activity related to flight, learners conduct two simple tests to explore how lift works.

Exploring Size: Ball Sorter
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In this activity, learners use sieves with different-sized holes to sort balls by size.

Double Replacement Micro-Reactions
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In this chemistry activity, learners use common chemicals to examine reactions that occur between two aqueous solutions.