Yesterday was my sister in law's 13th birthday. We had a 'joke' party for her, that started as a joke and ended up actually happening. She doesn't really like pink and we kept joking that we were going to have a pink birthday party for her this year. So a friend made her a pink Barbie cake, we decorated in pink, and gave pink presents. We have real presents we will give her at her real party we have for family on Sunday.
After the party I was going riding at a friends house where we keep our horses, and since she LOVES horses I thought she might want to do something she actually liked on her birthday, ride horses. I did have to make it slightly less pleasant by taking pictures of her, but I like how they turned out, so she can get over that. :)