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In this activity, learners practice drawing 3D structures in two dimensions. Learners draw cube stacks from five different points of view.

1 cent - $1 per student Ages 11 - 14 45 to 60 minutes
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This perception trick focuses on conflicting information to the brain...instead of trying to see two images, you're trying to get a bright spot by overlapping the image you see through two tubes.

1 cent - $1 per student Ages 4 - 11 Under 5 minutes