My daughter turns 9 in December! We usually celebrated birthdays somewhere else, like an aqua park o…

My daughter turns 9 in December! We usually celebrated birthdays somewhere else, like an aqua park or a kids' play center 😄🤷️ We don't know what else interesting we can come up with. Do you have any ideas on how you celebrate? Please share! Also, my son turns 18 in January, and I want to gift him or do something special. Please advise. Don't ask about their interests, right now all they care about are their phones, and they already have them.