You can not make a reservation until you board the ship - No way to do it in advance - Depending on your daughter's age, she probably won't be able to go - The spa is for ages 18 and up - They do have special teen nights - but I believe that is for ages 14 and up -
I loved my manicure! Was really good - The only problem was that the lady tried to sell me so many products the whole time! She must have tried to sell me at least 8 things!!!
I have read on these boards though, that you can request no selling - you just want the manicure - and they will oblige!
Hope this helps!
Karen