Hours could be misspent enjoyably in this great website: Craig Damrauer’s All New Math (as it’s American, this site has only one math). Basically full of occasionally thought-provoking, often inane, sometimes suggestive, and every now and then, quite perspicacious equations about life.
In an age where art is as much (if not more) about concept as it is about draftsmanship, this is one I particularly like:
I wish I’d thought of that.
And just to give a flavour of some of the other silliness, here’s this: