The Boo costume from Monsters, Inc. is such a fun choice! Boo's adorable outfit is a pink nightshirt with pigtails, and sometimes she's seen in a cute monster disguise. Do you already have a costume in mind, or are you looking to create one? It could be a fun DIY project if you enjoy crafting. What's your favorite part about Boo's character? I'd love to hear any plans you have!