“One of my central mathetic tenets is that the construction that takes place “in the head” often happens especially felicitously when it is supported by construction of a more public son “in the world” – a sand castle or a cake, a LEGO house or a corporation, a computer program, a poem, or a theory of the universe. Part of what I mean by “in the world” is that the product can be shown, discussed, examined, probed, and admired. It is out there.”
Papert, S. (1993) The Children’s Machine: Rethinking School in the Age of the Computer. NY: Basic Books. Page 142.