Glad you asked...
To make a Peter Pan, there are several items you need to collect. A piece of green felt big enough to fold into a triangle, glue gun or thread and needle to sew the felt together, and a red feather. Once the triangle is sewn together but leaving the bottom portion open to fit on your head, glue or stitch the feather to the side of the hat. Done! Directions for Making a Peter Pan Hat http://www.peterpancostumesite.com/peter...
Then again, this answer might help you...
To make a Peter Pan hat from felt you will need felt, scissors, pins and thread. Start by cutting out a triangle shape. The top of the triangle should be more towards the back.

