White Rabbits (lots of those left over from yesterday!) and happy April Fool's Day, the patron holiday of Pen-Elayne on the Web's Silly Sites! Fortunately, I don't have to compile any this year, as The Mary Sue did it for me with a terrific roundup. I particularly adored Vimeow because it's also Amy's 16th birthday today (obligatory kitty pic on my Facebook page). Here are many more prank sites via Buzzfeed. And honorable mention to Heidi for pointing us to the Center for Cartoon Studies' April Fool's Day page. What other cool silly sites did y'all see today?