so i have a question about MToTP.im not sure if anyone else has posted a thread asking the same question, and if the did sorry for asking again.lol

okay so my Boyfriend surprised me with tickets for MToTP next Wednseday, October 28th and im really excited to go but my question is, is it more of a kid thing or is it fun for adults too??and what are the costume rules?do u have to dress like a Disney character type of thing or can it be anything?
thanks so much!!