Here's the last of the birthday cards. It was for my sister, who just turned 21. Way too old to be displaying this kind of behaviour.
(Actually, I drew the picture of the girl on the beach and then decided to turn it into a birthday card. I wasn't sure how to relate the picture of a child playing in the sand to turning 21, so I just added in some poop. Basically there are some things that are universally funny, and poop is one of them. Other things that fall into this category are fart jokes and men dressing up as women.)