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In this simulation of natural selection, learners use binder clips in three different sizes to represent the diversity of beak sizes in a bird population.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this outdoor game, learners simulate a herd of deer trying to survive in an area called the "home range." Learners explore the concept of "carrying capacity"—what size population of an organism can

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners investigate the food, water, and space needs of common livestock animals.

free Ages 8 - 18 45 to 60 minutes
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This is an outdoor activity designed to demonstrate evolution of feeding behavior in flocking, schooling or herding animals that maximizes allocation of food resources and enhances survival.

$5 - $10 per group Ages 14 - 18 1 to 2 hours
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In this game, learners each represent a different organism in an environment. They build a web during the activity, and discover how all the players in an ecosystem depend on each other.

$1 - $5 per group Ages 8 - 14 30 to 45 minutes
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In this outdoor, freshwater activity, learners explore the behavior and food preferences of crawdads (or crabs) by "fishing" for them with various baits.

$10 - $20 per group Ages 6 - 11 45 to 60 minutes
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The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

$5 - $10 per group Ages 8 - 18 1 to 4 weeks
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In this outdoor activity, learners explore how a surprising number of animals use human-made litter, such as cans and crumpled paper, to find food and shelter in their environment.

$5 - $10 per group Ages 6 - 14 45 to 60 minutes
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This activity (on page 3 of the PDF under GPS: Animal Scent Activity) is a full inquiry investigation into animal behavior.

$5 - $10 per student Ages 8 - 14 1 to 2 hours
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In this outdoor activity, learners find the swollen bumps known as "galls" on various plants and get a closeup look at the parasitic animals living inside.

$5 - $10 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners are divided into teams.

$10 - $20 per group Ages 14 - 18 2 to 4 hours
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This activity provides a hands-on experience with a scale model, a relatively high viscosity fluid, and feeding behaviors.

$5 - $10 per group Ages 8 - 18 30 to 45 minutes
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This activity focuses on interactions within Earth systems and the effects of human activities. In this activity learners build a biomass pyramid.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this activity and/or field trip, learners investigate the water currents that aquatic animals create when they breathe, feed, and propel themselves through water.

$10 - $20 per group Ages 8 - 18 30 to 45 minutes
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This activity helps the learner answer the question: "What environmental problems arise due to animal and human overpopulation and what might need to be done to combat these problems?" Learners play a

$1 - $5 per group Ages 14 - 18 1 to 7 days
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In this activity, leaners will observe the process of natural selection on a population of birds called 'Springbeaks' over four seasons of breeding on an isolated environment called 'Clippy Island.' L

$10 - $20 per group Ages 11 - adult 45 to 60 minutes
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In this activity, learners of all ages will design a functional bird feeder using familiar, every day materials.

$5 - $10 per group Ages 4 - adult 30 to 45 minutes
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In this activity, learners investigate different types of bird beaks using household items which mimic different beak examples.

$1 - $5 per group Ages 4 - 8 10 to 30 minutes
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In this activity (page 7 of the PDF), learners will investigate the contents of owl pellets. Learners will discover how owls digest their food as well as the kind of animals they eat.

$5 - $10 per student Ages 8 - 14 30 to 45 minutes
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In this activity, learners compare frog eggs to chicken eggs to better understand why frog eggs need water. Learners compare a boiled chicken egg to "frog eggs" represented by boiled tapioca.

$1 - $5 per student Ages 4 - 14 4 to 24 hours