Here's another direction to consider: tickets to things they've never seen before, which will give them some confidence that they are people of the world, for example: a symphony orchestra; live theater; professional sports event; industry fair.
Whatever they have not yet attended in their lifetime so far, even if it's a bit outside their comfort zone. If they attend now, it will make them more likely to explore those places on campus visits, and later attend such events on campus.
Consider buying them 2 tix to invite their best friend, rather than go as a family, if you think that'd be happier for them. IT's great to be taken as a child to see The Nutcracker; quite another to be given two tickets to a professional modern dance recital or hear something edgey...like Debussy.
with a friend.
You'd be amazed. Our regional theater community here discovered that many young adults had been to movies but never to a live professional theater production, other than high school plays/musicals. They actually paid two sets of college student couples to come and experience one. It was covered in the newspaper.
And in our house, which is all about performance, we had never gone to a single professional sports event. So we all went to see the Toronto Blue Jays, just to see what everyone is talking about with their excitement over spectator sports.