Q: Why was the tree excited about the future?
A: It was ready to turn over a new leaf!
Explanation: “To turn over a new leaf” means to start anew, to start again, fresh. Someone who has had problems might turn over a new leaf and begin again (study more, learn something new, stop a bad habit, start a new good habit such as exercising, …).
This joke plays with the word leaf and makes me think about the future. What are your plans? Do you need to turn over a new leaf?