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This fun and simple hands-on astronomy activity lets learners build a scale model of the universe with little more than adding machine tape.

In this activity, learners are challenged to design and build a miniature tree house in a potted plant. This activity uses engineering concepts to encourage creativity.

This paper describes a working-model demonstration of Ernest Rutherford's 1911 experiment about the nature of atoms.

This is a classic exercise for visualizing the scale of the Solar System.