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Gieant Sieve Sorter
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This Exploratorium activity explores size and scale. Through four levels of screen sizes, learners can sort out objects of different sizes.

Fish forms
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In this activity, learners create a three-dimensional sculpture while examining the characteristics of fish.

The Thousand-Yard Model
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This is a classic exercise for visualizing the scale of the Solar System.

Introduction to Ocean Zones
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In this activity, learners will create a diagram of the ocean zones and determine what organisms live in each zone.

Cutting it Down to Nano
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This simple activity uses paper and scissors to convey two key concepts to learners: the nanoscale is very small and working on the nanoscale requires special tools.

Build A Treetop Walkway
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Build and test a scale model of a rainforest canopy walkway.

Exploring Size: Scented Solutions
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

Operation Espionage
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In this activity, learners create and reveal secret messages written with invisible ink! The invisible ink is actually a baking soda solution, and the magical revealing liquid is fruit juice.

Shaking It!
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In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.