How old you have to be to go and sign up as a teenager and how much is it and what they ask you if you there for the first time

Hi there, you can sign up for your own membership starting at 16 years old. If you're 16-17, you'll need a parent or guardian present to complete the sign up process.

I think you have to be at least 18 to sign up by yourself. They ask you for the payment method you plan on using and they need to see an ID. You'll probably have to sign a safety waiver as well. Usually costs $10 to sign up.