At school, if you are no longer a student, it symbolizes the state of mind of youth.
A big tree means that you can rely on others or live a stable life.
Swing, in most cases, is a happy mood and a sense of freedom to fly, but it is safer than flying.
This expresses your experience or feelings about your present life.
The small low wall next to the pedal means protection and support here. You can rely on a good environment to experience the beauty of life.
Old classmates, they appear because the school brings back memories and lets them know that you are doing well now.
I can't see them clearly because I don't have much contact now.