I randomly picked up this book at the library, starting flipping through it and instantly discovered it’s awesomeness!!
If You Were a Parrot by Katherine Rawson, Illustrated by Sherry Rogers
All you need to make the beak is some cardstock paper, scissors, a hole punch and two rubber bands. I trimmed the ends of my toddler’s to make it smaller so it would fit her better, but the pattern was perfect for my 6 and 8 year old.