Can't go wrong with good old party games at that age!
Pin the tail on the donkey but use something to match the party theme (eg put the treasure on the X for a pirate theme, Woody's hat on his head for Toy Story, Lightening's number for Cars etc)
Pass the parcel Simon says (the pirate says, Buzz says, Mater says etc)
Musical statuesIf she wants to make sure there are no tears for not winning, every time a child is out they get a sweet, so a couple of big bags of haribo come in handy

(she could also wrap a mini bag of haribo in each layer of paper in pass the parcel)