The first one is Spring. The mouse is giving Buttons a tissue to clean the chocolate on his mouth.
Then is Summer, where Buttons is selling lemonade and using the tissues on the fan to keep cool. Followed by Fall, where the owl is sick with a cold and the monster under his bed is trying to give him a tissue to get better, only that this scares Buttons more. And the last one, is Winter, where he is taking care of his snowman with a runny icicle nose.
Best Wishes - Ed -