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In this activity, learners use basic measurements of the Earth and pieces of rock and iron to estimate the mass of the Earth.

free Ages 14 - 18 45 to 60 minutes
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In this activity, learners use their hands as tools for indirect measurement.

free Ages 11 - 14 10 to 30 minutes
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In this activity, young learners go on a walk with caregivers and use their senses to observe nature with the help of scavenger hunt sheet.

free Ages 4 - 8 10 to 30 minutes
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En esta actividad, Mateo y Cientina enseñan a usar modelos para ver las causas de las fases lunares.

free Ages 8 - 14 5 to 10 minutes
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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.

free Ages 4 - 18 5 to 10 minutes
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In this lesson, learners will understand the concepts behind endangered and extinct animals and develop their own conservation plan to save three endangered species.

free Ages 8 - 18 45 to 60 minutes
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In this activity and game, learners will train to improve balance and spatial awareness by performing throwing and catching techniques on one foot.

free Ages 8 - 14 1 to 4 weeks
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In this lesson, learners will practice graphing and statistically analyzing data.

free Ages 8 - 14 45 to 60 minutes
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Walk a toy to the edge of its doom, maybe it'll fall off the edge of a table, but it will safely stop right before falling.

free Ages 6 - 14 Under 5 minutes
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This activity aims to stimulate discussion on the question of whether computers can exhibit “intelligence,” or are ever likely to do so in the future.

free Ages 11 - 18 10 to 30 minutes
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Learners tour their school or home looking for sources of indoor air pollutants (IAPs).

free Ages 8 - 14 45 to 60 minutes
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In this math lesson, learners are given 15 chips and a number line labeled from 2-12.

free Ages 11 - 14 45 to 60 minutes
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Learners draw pictures of how they envision scientists. By comparing and discussing the features in their pictures, they can discover common thoughts and stereotypes about scientists.

free Ages 8 - 11 10 to 30 minutes
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In this activity, learners will use household items to design and build an elevator that will carry 2 passengers to a height of 16 inches...or higher!

free Ages 6 - adult 30 to 45 minutes
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In this thought-provoking activity, learners plan a hypothetical project to build and operate wind turbines in their community.

free Ages 8 - 14 2 to 4 hours
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In this activity, learners will explore trends in shark populations using shark landing data from the National Marine Fisheries Service.

free Ages 14 - 18 45 to 60 minutes
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In this activity, learners will make cleaning up more fun with predictions and counting. Estimate how many things are on the floor (or table), then count as they are picked up.

free Ages 4 - 11 5 to 10 minutes
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In this activity, learners act as water molecules and travel through parts of the water cycle to discover that it is more complex than just water moving from the ground to the atmosphere.

free Ages 6 - 14 30 to 45 minutes
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In this activity, learners model a population of deer and see how the number of deer changes over time.

free Ages 11 - 18 10 to 30 minutes
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In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.

free Ages 8 - 18 30 to 45 minutes