Hi, Alex. So, while you're away, I just watched an episode of Sesame Street about Bert's birthday. It's when Ernie wants to throw a birthday party for Bert. But he doesn't want to have one. In the end, Bert change his mind. Also in the episode, in Elmo's world, Elmo learns about birthdays. And his pet goldfish has a birthday, too.
Thank you,Manuela. :-)