Dilip G Banhatti:
April 21, 2012 at 6:18 pm
There's a game of about a dozen blocks, each of same size & shape, roughly similar to ones shown, which can be made into close to hundred shapes by stacking together in different ways. The shapes are given as three views of each such 3D structure, starting from simplest to more & more involved. It's the best introduction to engineering drawing, where the 3 views are called, plan, elevation & top view, that I have come across, building up the student's intuition step by step. I'm happy to know who designed such toys for children!