There are so many trendy products out there right now, claiming to make your baby sleep. But do they really work? Are they necessary? And will they cause sleep regressions later? Before I highlight a few of my favorite and least favorite baby sleep products out on the market, let me set up some of information to help you understand what babies ‘need’ to sleep and how that changes over a relatively short time. When a baby is born he has what we have termed the startle reflex.