Answer:
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
I love spinach.
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
I am free the first time and the second time, but the third time is going to cost you money. What am I?
I hop around and deliver eggs at Easter.
No matter how little or how much you use me, you change me every month.