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In this activity, learners will make seed orbs to grow new trees and plants. Learners will explore ecology and life cycles as well as stewardship through this activity.

Build and test a scale model of a rainforest canopy walkway.

In this hands-on activity, learners use the steps of the design process to create a hook to rescue a "space capsule" from the water.

Students design and build their own parachutes in this hands-on engineering project.

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

Learners design different shaped bandages for different purposes. First, they draw their designs on paper.

In this activity (on page 2 of the PDF), learners make a plastic protein polymer from milk. Adding vinegar to milk causes the protein casein to solidify or curdle.

In this activity, learners create and reveal secret messages written with invisible ink! The invisible ink is actually a baking soda solution, and the magical revealing liquid is fruit juice.

In this activity, learners are invited to imagine the park of their dreams!

Using a vertical wind tube and using simple materials, individuals and groups attempt to design a "satellite" that floats for at least 5 seconds.

In this fun and, at times, hilarious force and motion activity, learners will use household objects to build a crazy contraption and see how far they can get a tennis ball to move.

This Exploratorium activity explores size and scale. Through four levels of screen sizes, learners can sort out objects of different sizes.

This is a simple activity for learners to create a traditional musical instrument. Pan Pipes have developed all over the world in different cultures, from South America to Greece and China.

In this activity, learners build water-propelled engines from soft drink cans.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

In this activity, learners will make their own "ball bearing" with two jar lids, marbles, and some household supplies.