A while back I reviewed You Can Count on Monsters, a delightful book showing monsters built from the prime factorizations of each number 2 through 100. (1 is in the book, but is sad, since it can't be made from primes.)
There are now lots of other takes on this idea. Brent, at The Math Less Traveled,
made some gorgeous factor diagrams back in early October. When he
posted them, many of his readers took them as inspiration to do more.
One made a factor tango. Brent was then inspired to improve on his own diagrams. Here's a partial picture of what's he done:
He says he'll be making posters and t-shirts. I think this would make a great poster for a math classroom. Maybe I'll get copies for some of my colleagues.