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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.

In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

In this outdoor activity, learners search for lichen, a combination of a fungus and an alga living together. Lichen grow where most other plants cannot, on rocks, the trunks of trees, logs and sand.

In this activity, learners create models of erosion and floods and learn to recognize both in their environment.

Learners place their hands on different metals and use an ammeter to monitor the flow of electricity from one metal to another.

In this laboratory experiment, learners explore how effectively different sunscreens protect yeast cells from damage caused by ultraviolet (UV) radiation.

In this activity, learners conduct a controlled experiment to examine how temperature will affect the height of a soda geyser.

In this geology activity learners build a "squeeze box," which allows them to compress layers of sediment. This is a great way to investigate folding and faulting in the Earth.

In this activity, learners evaluate the potential performance of air rockets placed inside a wind tunnel.

In this activity, learners conduct a controlled experiment to examine how many Mentos are needed to make the tallest possible soda geyser.

In this activity, learners conduct a controlled experiment to examine which brand of soda makes the best (highest) soda geyser.

In this outdoor activity, learners make their own organic-rich soil. Depending on where this activity is done, learners will probably discover that their local soil is low in organic matter.

In this activity, learners create and experiment with wind tubes. These tubes are a playful and inventive way to explore the effect that moving air has on objects.

In this activity, learners will build a ball run contraption.

In this activity, learners use sand and ice cubes to create a model of permafrost and the effects of the ice melting through the surface.

Using recycled materials, learners will design a transportation vehicle to carry an egg in an egg toss (a rudimentary model of a shock absorbent transport vessel).

In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.

In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site.