I used an old 70's pattern for the hat, but you can for example use Petchy's pattern for reversible toddler's hat/bonnet. Unfortunately my hat turned out to be too small for my daughter, but it will make a nice gift for someone elses baby.
Where the Wild Things Are
Crocheted hat with super chunky wool , bear ears and ear fleps
Beware the wrath of Red!!
Knitted Animal Hats
for all the Whovians out there