Put your mind to it that you are going to have fun with this child this day end enjoy! Rent a few kids' movies, get out a few of his toys and play together, draw some pictures together (kids love to scribble), sing some songs, maybe bake some cookies together. Their attention span is short at that age, so you will be able to get alot of things in for short periods of time. You will be tired at the end of the day, but the child will love you for it. Oh yes, there can be a nap time too! 
