Once there was Spring. And Spring really wanted to become Summer. So the Spring waited a long time. A very long time! And it waited and waited for about three months.
And then on the first day of Summer, it was really hot and happy.
Because it was really so tired of being a little cold, and then a little cold and hot and it really wanted only to be hot. So finally it became Summer and it was so happy because it could be hot! 
The end.
