erm.. plan your budget and your invites ahead of time. get your dear daughter to pass it to her friends and their parents to rsvp to you. this way you will know how much food you will need.. AND how many would be attending.. coz its december holidays..
get ideas from your dear daughter on how she wants the party to be like.. however, you must guide her in being realistic with your budget.. unless, you are willing to go all out..
do plan games/entertainment and finger food throughout the party.. hope this helps! =)