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In this activity, learners explore how objects can have positive, negative, or neutral charges, which attract, repel and move between objects.

This activity was designed for blind learners, but all types of learners can explore the three states of matter by examining tactile models that illustrate the characteristics of particles in each sta

This is a quick activity (on page 2 of the PDF under Stained Glass Activity) about the "Tyndall effect," the scattering of visible light when it hits very small dispersed particles.

Are balloons porous or non-porous? In this activity, learners watch an entertaining Mr. O video and conduct a simple experiment to find out.

By tossing, collecting, and sorting beanbags, learners understand how the IBEX spacecraft uses its sensors to detect and map the locations of particle types in the interstellar boundary.

In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.

In this activity, learners use colored candy to represent subatomic particles and make a model of an atom (Bohr model).

In this lesson, learners cut paper into very small pieces to explore the small size of quarks, the smallest thing we know of on Earth.