What do I do with a 4th grade student who has a habit of chewing on erasers, crayons and pencils?
Good idea, things like this can be hard to stop but giving another outlet is a good option.
I like your ideas, this will definitely pull the student from being nervous, and bring them out of their shell. However, what if it is social anxiety? I would suggest that you do meet and greet every morning to allow the students to get comfortable with one another and feel comfortbale to voice their opinions in front of everyone because they know no one will make fun of them.
I agree with this solution