Either a camper or a tree house sounds like a lot of fun!
If your parents think it’s a good idea, maybe you can have a family meeting. You could make two lists: one for the good things about a camper, and the other for the good things about a tree house. The difference in cost between the two might also be important.
Once everyone’s ideas are shared, perhaps your family can come to a decision together.
Art by: Keith Frawley