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Tiny Geyser Models
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In this activity (located on page 2), learners will construct tiny model geysers out of film canisters, warm water, and antacid seltzer tablets.

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

Ocean Home: Swimming Fishes
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In this activity, learners model, on a human-sized board game, how changes in water temperature may affect fish distributions and, ultimately, fisheries.

Burn a Peanut
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In this activity, learners burn a peanut, which produces a flame that can be used to boil away water and count the calories contained in the peanut.

Toilet Model
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In this activity, PVC pipe, plastic water bottles and vinyl tubing are used to make a simple working toilet model. The model shows the role of a siphon in the flushing of a toilet.

Invent on the Spot
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In this activity, learners design a device to solve a problem: how to get a ball out of a drain pipe.

Hydraulic Car
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In this activity, learners build cars using syringes and water-powered hydraulics. Learners construct the car frame out of cardboard and set up a hydraulic system to raise and lower the car.

Small Habitats
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In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).

Witches' Potion Demonstration
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In this chemistry demonstration, learners will discover that phenolphthalein is an acid/base indicator. One learner will read a poem about four witches making a potion.

Make Your Own Soda Pop
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In this chemistry activity (page 8 of the PDF), learners will identify the instances of physical change, chemical change, and solutions while making homemade soda pop.

Air Pressure
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In this experiment, learners use a blow dryer and water bottle to observe and record changes in air pressure caused by changes in temperature.

The Shape of Floatation
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In this activity (on page 2 of the PDF under GPS: Sailboat Design Activity), learners will discover how the shape of an object, not just its weight, determines whether it floats or sinks.
Soda Pop Can Hero Engine
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In this demonstration/activity, water streaming through holes in the bottom of a suspended soda pop can causes the can to rotate.

How can Clouds Help Keep the Air Warmer?
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In this activity, learners explore how air warms when it condenses water vapor or makes clouds.

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.

Changing Colors
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In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear.

Earth Atmosphere Composition
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In this activity, learners use rice grains to model the composition of the atmosphere of the Earth today and in 1880. Learners assemble the model while measuring percentages.

Mapping a Study Site
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In this outdoor activity, learners use a mapping technique to become oriented to the major features of an outdoor site.

Cave in a Cup
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In this activity (page 2 of PDF under GPS: Cave Swallows Activity), learners will model how caves are formed by placing one piece of chalk in a cup of vinegar and another piece in a cup of water, then

How it is Currently Done
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In this quick activity, learners observe how wind creates ocean currents.