you should really do something with the kids that they enjoy, not what you feel is fun. cause ive been in classes were the teacher does some boring games. for example you should do some games that you split the class into two teams, divid the the white board or chalk board into 2 groups. then you put to people up at the board from each team and ask them a question. who ever writes the answer (correct answer) down first wins and their team gets a point.