I have idea of activity to do before class begins. I work at a head start and we have open house before school begins. Something that helps the children become familiar of their classroom is to have a scavenger hunt. I make a list of things to search for, "Look for your name on the desk or cubby." "What is your symbol?" "Check out the toy and puzzle area, count the puzzles." "Did you find the book area?" "Did we have your favorite story, if so, what was it?" Continue with things to find in the classroom, once they have completed the scavenger hunt, they bring it to the teacher and and introduce their parents and receive a prize. It is something for them to do and not just come and tour the classroom and never talk to the staff and get acquainted. They leave feeling important and ready for school to start. For 3 to 5 year olds, it make transition easier.