[Cross posted on Game Theorist] I am a big fan of Lego and we are big consumers in our household. (Once you decide that you can enjoy children’s toys the sky is the limit on expenditure!)

In my office, I have printouts of Lego sculptures of Escher prints. Their place on the web had been lost but they have reappeared. Click here to view them. You will see that it is all in the angle at which you are viewing.