Shark hats were one of the activities suggested in the packet of materials we received from the Collaborative Summer Library Program. 
However, the hat that resulted from following the instructions would only fit a very small monkey doll, whose head was smaller than that of a newborn human baby. So I had to redesign the shark hat. (I will add instructions, measurements, and the template for the shark body to this post later.)
This hat can be made to fit a variety of head sizes by changing the distance of the first folds from the center line, as you can see from the photo of a mother and her daughter modeling their hats.
I really liked the contrasting hat styles worn by this grandfather and grandson.
Check out the gallery below of shark hats @ the library!
