Origami hat design by jeremy shafer diagrams can be found in his book origami to astonish and amuse he has also made a tutorial for it tutorial for it part 1 ... part 2 ...
by Colors Paper
by Origami Plus - Easy Origami
by How To Origami
by Alf Kids Station
by Adam Pennington
by Mica's Paper Craft Channels
by Golden Fire Origami