Baby's First Helmet (washingtonpost.com)
This is an intelligent and accessible discussion of plagiocephaly, aka 'funny looking baby heads'. We ask parents to place babies on their backs to reduce the incidence of sudden death (seems to work!), but this has an unintended consequence -- squished heads. The problem probably resolves on its own, but noone can guarantee full resolution. The helmets seem to speed up head rounding and they seem troublefree. They're not cheap though!