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Dripping Wet or Dry as a Bone?
Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

Highway Seismograph
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This is an activity that models the operation of a seismograph, a tool used to measure the size of earthquakes.

Wind Mapping with Bubbles
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Discover the wind's direction using bubbles, a map and a keen eye. Learners blow bubbles and note their general direction on a map, taking readings from different points around a building.

Battleships: Searching Algorithms
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This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

Soccer
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In this math activity (Page 12 of the Play Ball! PDF), learners play a game of "soccer" and analyze the results of the game.

Marble Game
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In this activity, learners construct a simple game to test their hand-eye coordination and steadiness of hand.

Basketball
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In this math activity (Page 14 of the Play Ball! PDF), learners play a game of "basketball" and analyze the results of the game.

Hovercraft Racers!
Learners build a simple hovercraft using air from a balloon to levitate a craft made from a compact disc (CD).

How Far?
To learn how friction affects motion, learners build a measurement tool from a rubber band and other simple materials.

Super Spinners
Learners build at least two different spinners (tops) to investigate how mass distribution, size, and shape affect the length of time the spinner spins.

Fun with Bernoulli
Learners conduct four simple experiments to demonstrate the effects of air pressure.

The Muddy City: Minimal Spanning Trees
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In this puzzle, learners investigate the decisions involved in linking a network between houses in a muddy city.

Action-Reaction Rocket!
Learners construct a rocket from a balloon propelled along a guide string.

Foam Tower
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In this activity (page 1 of the PDF under SciGirls Activity: Water Slides), learners will whip up some suds with a cup of water and a tablespoon of dish soap until the bubbles are stiff enough to star

How Big Were the Dinosaurs?
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In this activity (located on page 4 of PDF), learners gain insight into the actual size of dinosaurs and practice making estimations and measurements.

It's the "Rain," Man
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In this weather forecasting activity, learners use common materials to construct a rain gauge and measure daily, monthly, and yearly rainfall.

Tossing Coins
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In this math game (Page 17 of the Are You Game? PDF), learners investigate probability by tossing coins.

Elephant Foot
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Using a real-size sketch of a baby elephant's footprint, learners estimate, measure and record the width (diameter) and outside edge length (perimeter or circumference) of the footprint.

Partners in Pollination
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In this activity, learners identify the reproductive parts of plants and the animal (bee) structures involved in pollination.

Condensation
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In this activity, learners explore the process of condensation.