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Coins are everyday objects which tell a lot about the people who use them.

In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

Learners explore soybeans, soak them in water to remove their coat, and then split them open to look inside. They also make a musical shaker out of paper cups, a cardboard tube, and soybeans.

In this activity, learners explore the potential of interchangeable standard parts to create a large number of unique creations in different combinations.

In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.

In this two-part activity, learners map a navigation plan to get from Earth to Mars and back. In activity one, learners represent the orbital paths of Earth through dance and dramatic movement.

Using information from the My Place in Space lithograph, learners write and/or draw a postcard to friends and family as if they had gone beyond the interstellar boundary of our Solar System, into the

In ancient Chaco Canyon, the people used a "sun dagger" petroglyph to mark the passing of seasons.

In this activity (located on page 6 of the PDF), learners explore the ways people access water in their homes.

Somatic Cell Nuclear Transfer (SCNT) is a cloning method that involves transferring a nucleus from a somatic cell of the individual to be cloned to an enucleated egg.

In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other.

Learners create an Incan counting device called a quipu (pronounced kee-poo).

In this activity, learners imagine what the world might look like if we could build an elevator to space!