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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this activity, learners will observe magnetic properties and sort objects by them. This activity uses everyday items to teach learners about magnetic forces, poles and properties of magnets.

In this activity, learners with explore the gases present in air. They will then build their own wind cannons and challenge family and friends to a friendly competition.

In this activity learners will "rescue" animals from tape and then sort the animals. Learners will use science process skills such as categorizing and making observations while they play.

Learners make a counting/estimating jar to exchange with friends or bring home.

In this activity, learners will create their own coral polyps - the basis for a coral reef.

In this activity, learners create slime to model mucus and examine how it collects simulated particles. Mucus keeps particles from the environment out of our lungs when we breathe.

In this activity, learners will build thier own balance scale. Learners will explore weight and comparison through this activity.

As a group, learners investigate three packages which are all the same size and shape, but have different contents. One is filled with foam, one is filled with wood, and one is filled with metal.

This is an activity exploring color and color mixing.

In this activity, learners compete to be the first to win twenty counting pieces. First, learners draw patterns on only one side of four craft sticks.

In this "Sid the Science Kid" activity from Episode 103: Enough With the Seashells!, learners practice estimating numbers of objects (like shells) and then check their estimates by counting.

In this activity, learners play a traditional Mexican game of chance with a twist. Learners take turns spinning a special "Toma Todo" top.

In this physics activity, learners will explore buoyancy.

This is a deceptively simple game to teach strategy, planning, and pattern analysis. In this game, learners take turns removing tokens from a board, and develop a plan to take the last piece.

In this activity (16th on the page), learners play a variation of the "I Spy" game to explore color. Learners work in teams with each team assigned a color.

In this game, learners take turns guessing toy animals from around their house based on the toy's characteristics.

In this activity, learners create a map of a hidden surface using a "sounding stick" -- a technique similar to how underwater maps were once made.

In this activity, learners investigate balance and symmetry by designing a symmetrical butterfly, using a paper cutout.

In this activity learners will investigate magnetic and non-magnetic items in a sensory bottle.