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In this activity, learners overlap the three primary colors to see how all other colors are made.

free Ages 11 - 18 10 to 30 minutes
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We're told from a young age that we have 5 senses, but we have many more. One of which is our awareness of our own body part's orientation and position.

free Ages 6 - 18 Under 5 minutes
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In this quick activity, Dracula has a hole in his house and learners help solve the problem by using a mirror and protractor to reflect incoming light out of his house.

free Ages 8 - 18 Under 5 minutes
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We don't normally view people upside down and so our brains aren't accustomed to it.

free Ages 4 - 18 Under 5 minutes
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In this activity, the learner asks yes-no questions to identify a secret object (similar to Twenty Questions). This game is easy to adapt for different ages and different kinds of contexts.

free Ages 4 - 14 5 to 10 minutes
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This activity (page 2) draws upon a familiar, computer-based concept related to visual resolution: pixilation.

free Ages 11 - 14 5 to 10 minutes
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In this activity, learners will train to develop upper and lower body strength in their muscles and bones by performing body-weight squats and push-ups.

free Ages 8 - 14 1 to 4 weeks
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Known as the waterfall effect, this activity demonstrates adaptation in our visual system.

free Ages 6 - 14 Under 5 minutes
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In this hands-on activity, learners make the world's simplest Cartesian diver, using only a plastic bottle, some water, and a condiment packet.

free Ages 6 - adult 5 to 10 minutes
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This is an online activity about simple machines. Learners will try their hand at putting these amazing devices to work. They will use several simple machines to help "build" a tree house.

free Ages 8 - 14 5 to 10 minutes
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In this activity (on page 7), learners explore the meaning of a "carbon sink." Using simple props, learners and/or an educator demonstrate how plants act as carbon sinks and how greenhouse gases cause

free Ages 8 - 14 45 to 60 minutes
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In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video.

free Ages 6 - 18 30 to 45 minutes
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In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.

free Ages 6 - 18 Under 5 minutes
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In this activity, learners graph 48 hourly air temperatures from a local weather observation site and observe the diurnal temperature variations.

free Ages 8 - 14 30 to 45 minutes
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Use this Moon Map Guide to help learners identify features on the Moon, while looking through a telescope.

free Ages 6 - adult 10 to 30 minutes
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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.

free Ages 8 - 18 5 to 10 minutes
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In this interactive activity, learners analyze seashells to explore phylogeny and evolution. Learners identify similar and dissimilar seashells to create a phylogenetic tree.

free Ages 11 - 18 10 to 30 minutes
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Los Momentos de Mixing in Math son actividades de 5 a 10 minutos que mantienen a los chicos ocupados, aprendiendo sobre el mundo, y usando matemáticas por su cuenta.

free Ages 4 - adult Under 5 minutes
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In this activity, learners will explore their center of gravity.

free Ages 6 - adult 10 to 30 minutes
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“Exploring Earth: Rising Sea” is a hands-on activity demonstrating ways to use topographical mapping techniques to track changes in sea level. The activity is connected to current NASA research.

free Ages 6 - 14 5 to 10 minutes