We just finished up our Disney World trip (and one day at Universal Studios), and it was amazing. Seriously, so fun. We spent the week hanging out with my family, and our kids had a blast together.
I made my kids t-shirts for each day. A vague take on various Disney characters.
-Mulan, Lightning McQueen, Snow White, Nemo
-Tiana, Adventureland-lost boys expedition, Rapunzel, pirate Mickey
-Mike (from Monsters, Inc), Jasmine, Simba, and Merida
-Harry Potter themed shirts for Universal's Islands of Adventure.
And I customized water bottles for all 14 of us going.
I also made an autograph book, though we barely ended up using it because the lines were so long.