A prism is a 3D shape which has a constant cross section - both ends of the solid are the same shape and anywhere you cut parallel to these ends will give you the same shape. For example, in the prism ...

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Since it crowdfunded on Kickstarter back in 2013, 3Doodler has come out with multiple versions of its 3D-printing pen -- including a kids version and a pro version-- as well as themed kits focusing on ...