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This fun and simple hands-on astronomy activity lets learners explore the difference between telescope magnification and resolution.

In this experiment, learners construct an equilateral triangle using graph paper, a pencil, protractor and ruler. They also make a "laser triangle" using a laser pointer and front-silvered mirrors.

In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye.

In this sunny day, outdoor activity, learners observe changes in shadows over time. The activity also helps to develop a sense of the Earth's motion.

This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.