For one day during my summer camp, I hosted an actual birthday party, western style.
My class was only two hours long, so it was easy to do.
First the students made party hats that they had to wear the whole class. We played pin the tail on the donkey and pass the package game, and the students won prizes. At the end of the class there was a pinata for them to break and collect candy.
For the last half an hour, I showed them a video of Mr. Bean's birthday party.
It was good fun!