1.
The Caterpillar from "The Very Hungry Caterpillar"
3.
"Cloudy With A Chance of Meatballs"
8.
Willy Wonka from Charlie and the Chocolate Factory
11.
A Character from Diary of a Wimpy Kid
15.
Any Member of One Direction
26.
Waldo from Where's Waldo
27.
If all else fails, you can dress up as a Middle School Teacher.