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In this activity, learners will be able to measure themselves in nanometers. A nanometer is a billionth of a meter, a unit of measurement used in nanotechnology.

In this activity (12th activity on the page), learners conduct an experiment to demonstrate how muscles are constantly feeding information to the brain about what they are doing.

Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

This activity (8th activity on the page) tests learners' ability to identify things using only the sense of hearing.

Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.

In this simple game, learners start to understand how to sort and categorize objects by trying to guess the connection between three items that someone else has chosen.

In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.

In this activity, learners explore how distance can affect the way we perceive the size of an object.

This is an online game about stopping distance. Learners choose one of three vehicles and one of three speeds.

In this activity (7th activity on the page), learners use their sense of touch to identify mystery objects hidden in socks.