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Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Build a Coral Polyp
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In this activity, learners build one or more edible coral polyps and place them together to form a colony.

Tree Tally
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In this outdoor activity and fun race, learners first find the most common type of tree in a forest site.

Periscope
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In this activity, learners construct a device that allows them to look over ledges or around corners.

Reason for the Seasons
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In this activity (on page 6 of the PDF), learners plot the path of the sun's apparent movement across the sky on two days, with the second day occurring two or three months after the first.

Find Your Way Around Without Visual or Sound Cues
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In this activity, learners play a series of simple games to investigate navigation without visual and sound cues.

Energy For Life
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In this activity about the relationship between food and energy (page 1 of PDF), learners observe and quantify the growth of yeast when it is given table sugar as a food source.

Metallophone
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In this activity, learners explore sound by constructing an instrument using some metal pipes, rubber bands, and a baseboard.

Reaction Time
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In this activity, learners conduct an experiment to test how fast they can react. Learners try to catch a piece of paper with a ruler printed on it (or a ruler) as quickly as they can.

Eat Like a Bird
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Birds' beaks are designed to allow birds to get the most of whatever food they need. In this activity, learners get an idea of how different beak shapes suit different food sources.

Fingerprints
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In this activity, learners examine their fingerprints and learn that they can be categorized by shape, but each fingerprint is unique.

Adaptive Device Design
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In this activity, learners explore the concept of how engineering has made possible the development of--and ongoing improvements to--adaptive devices that serve to help individuals with a wide range o

Animal Tape Rescue
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In this activity learners will "rescue" animals from tape and then sort the animals. Learners will use science process skills such as categorizing and making observations while they play.

Buried Bones
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In this activity, pairs of learners will create two make-believe dig sites by burying chicken bones in plaster of Paris--a powder that hardens when wet.

Do a Spacewalk!
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In this activity, learners train to increase muscular strength and improve upper and lower body coordination by performing the “bear crawl” and the "crab walk.” Learners perform the exercises over tim

Sensational Seaweed
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In this culinary activity, learners use multiple senses (sight, smell, touch, and taste!) to explore real seaweed samples.

Fossil Dig Site
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In this activity (located on page 5 of PDF), learners work in groups to create dig sites for display.

Food Forensics: A Case of Mistaken Identity
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This lesson is designed to serve as an introduction to the immune system. It can stand alone or it can lead into further studies of the immune system.

Bird Feeder
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In this outdoor activity, learners construct bird feeders and set them up at to investigate bird behavior for one or two weeks. Multiple feeder designs are suggested.
Splitting White Light
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In this optics activity, learners split white light into all its component colors using three household items: a compact disc, dishwashing liquid, and a hose (outside).