As a kid, I loved construction sets like Lego, Duplo and K'nex, as they gave me the ability to create anything I wanted no matter how big, how complicated or how realistic. K'nex was great for making complex objects while Duplo was more suited for large-scale, non-movable objects. Each set has its own advantages and disadvantages, but the one big headache was that they weren't compatible with each other. You couldn't combine parts from different kits to build something, because they simply wouldn't fit together.
3D printing revolutionises Lego
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