What’s the #1 Thing a Family MUST Do at Disneyland?

My family and I are gearing up to leave on the ultimate cheesy traditional family vacation. Before we leave I am trying to gather as much information from families that have already taken this vacation. I want to make sure we don't miss anything while we are at Disneyland!

So, if you have been to Disney what was your favorite moment with your kids? I need to know where the most magic is?