I love the book, If You Give a Mouse a Cookie… and what a fun costume idea to do with a friend, significant other or even a mom/baby costume! The DIY mouse costume is made mostly out of felt, and the DIY cookie costume is made out of a brown paper bag. So not only is the idea adorable, one of the costumes is even recycled!
See the complete tutorial for the DIY Mouse and Cookie costume on Instructables!