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In this delicious activity, learners get to make, taste-test and compare their own "brands" of homemade strawberry ice cream.

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

In this activity, learners explore what makes a boat float and sink. They examine and test various objects to determine why objects float or sink.

Learners make a counting/estimating jar to exchange with friends or bring home.

In this activity, learners will engineer three different parachutes to test how well each one works.

In this activity, learners will build thier own balance scale. Learners will explore weight and comparison through this activity.

Learners follow the template to build and fly a paper helicopter.

In this activity, challenge learners to keep an ice cube from completely melting in 30 minutes. Learners engineer a box or wrap to prevent an ice cube from melting.

In this engineering activity, challenge learners to make a "grabber" that can pick up trash. Learners use simple materials to create pinchers that can grab small items.

In this activity, learners build large-scale structures and cantilevers in a series of "building out" challenges with garden poles and tape.

In this activity, learners design a therapeutic agent to image and/or cure various diseases in the respiratory system.

In this activity, learners compare plant and animal life in different habitats including a sidewalk crack and lawn. Learners sort human-made materials and natural materials found in each habitat.

In this activity about human anatomy (page 16 of PDF), learners construct a model arm and discover how muscles and bones work together to achieve efficient movement.

In this activity, learners construct a simple air pressure launcher for paper rockets.

In this activity, learners build a mini crank machine to make a bird "fly." This engineering activity introduces learners to automata, rotational motion, cranks and cams.

In this activity about the solar system, learners use various light sources to examine ice with different components to understand how NASA studies planets and moons from space.

In this activity learners will build roller coasters and test them using small balls or marbles.

In this engineering activity, challenge learners to design a car using only 3 straws, 4 Lifesavers™, 1 piece of paper, 2 paper clips, tape, and scissors.

In this activity, learners will repurpose an old t-shirt to create their own yarn or string.

In this activity, learners will estimate how many seeds are in a fruit or vegetable, then count to find out. The result: mix estimation with healthy eating.