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Measuring Your Blind Spot
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In this activity, learners calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper.

Exploring Size: Scented Balloons
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In this activity, learners use their sense of smell to explore the world on the nanoscale.

Big Sun, Small Moon
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Learners will explore the concept of angular distance, and investigate why the moon appears to be the same size as the sun during a solar eclipse, despite the sun being much larger.

Lean, Mean Information Machine: Using a Simple Model to Learn about Chromosomal DNA
Source Institutions
Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell.

Programming Languages: Harold the Robot
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In this activity related to computer programming, learners give directions to a "robot" (either an adult or another learner) and find out which instructions the robot is able to follow, and how their
Diffraction Between Wax Blocks
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In this optics activity, learners explore diffraction by adding wax blocks to a ripple tank. The wedge-shaped blocks act as obstacles that the wave must bend around.

Ocean Home: Swimming Fishes
Source Institutions
In this activity, learners model, on a human-sized board game, how changes in water temperature may affect fish distributions and, ultimately, fisheries.

Sand, Plants and Pants
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In this activity, learners explore how the application of nano-sized particles or coatings can change a bigger material’s properties.

Modeling Limits to Cell Size
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This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.

Energy Use in the Americas
Source Institutions
Learners explore the relationship between energy consumption, population, and carbon emissions in the countries of the Americas.

Special Effects: Titanic and Beyond
Source Institutions
In this activity, learners investigate how geometry plays a role in perspective.

Animal House
Source Institutions
The goal of this activity is to design, build and test a house or toy for an animal.

The Adaptation Game
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To convey the concept of how animals adapt to survive, this game asks learners to imagine what adaptations a given animal would need to live in a certain environment—including environments where such

Leapin' Lizards
Source Institutions
In this outdoor activity, learners first explore lizard feeding behavior by creating a "lizard rig" to dangle different objects in front of live lizards and see which objects the lizards try to bite.

For the Birds: Environmental Effects on Population
Source Institutions
In this activity, learners will investigate how shorebirds and seabirds are extremely vulnerable to changes in their environment, whether human-induced or otherwise.

Plants Around a Building
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In this outdoor activity, learners discover how the environment around a building affects the growth of plants.

Mapping the Homunculus
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In this activity, learners will explore how the human brain interprets environmental stimuli.

Biomimicry: Synthetic Gecko Tape Through Nanomolding
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In this activity/demo, learners examine a synthetic gecko tape with micron sized hairs that mimics the behavior of the gecko foot.

Keeps on Pumpin': Your Heart
Source Institutions
In this activity, learners explore the great pump in their chests--the human heart!