To kick off the birthday month, let's start with a nice, simple powerpoint game.
10 in a Bed is for a whole class, and works best for young learners. Simply ask them questions on the topic of the lesson and, if they are wrong, hit the spacebar. When you do, the kids in the bed will roll over and one will fall out. The aim, for the class, is to keep as many of the kids in the bed by the time the questions have finished. You could also use it as a classroom management tool, unwanted behaviour sees a kid rolling out, and a reward is set for the number left in the bed.