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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.

Atmosphere Composition Model
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In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

Toilet Paper Solar System
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In this activity, learners build a scale model of the solar system using a roll of toilet paper.

Pea Brain!: Explorations in Estimation
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In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.

Solar System on a Stick
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Learners build a model of the planets in the solar system. In their model, the planets are spaced in their relative distance from the Sun.

What am I?
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In this activity, learners examine nanoscale structures of common things.

Exploring Tools: Mitten Challenge
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In this activity, learners build a LEGO® structure while wearing mittens. This activity shows learners how difficult it is to build small things when your tools are too big.

Scale Models
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In this activity, learners explore the relative sizes and distances of objects in the solar system.