Appetizer - No Groin-Drawing Allowed

I just found sketchswap.com, a site with the rather inventive idea: you doodle anything you want, click submit, and your doodle is transmitted to a random user; meanwhile, you get to see the doodle of another user. It's fun but almost frustrating to not know at all who your pic is going to or what they thought of it. Many similar communal whiteboard-type sites are somewhat R-rated - everybody is only into writing swears and drawing ... er ... groins and genitals, but I'm pretty sure Sketchswap has a filter - I doodled for several rounds and received only G-rated materials. It's fun for the whole family!