All that cute stuff looks great in catalogs, but it's dangerous for wee ones. While you may think you're preventing bangs and bruises with a crib bumper, the American Academy of Pediatrics (AAP) says there's absolutely no evidence that bumpers prevent injuries. In fact, a 2007 study found that crib bumpers caused suffocation or strangulation in some baby deaths. And in 2011, the AAP changed its stance on the matter, saying bumper pads -- no matter how thin, firm or well-secured -- should never be used. (In fact, a 2012 update in Pediatrics in Review noted that soft materials under, on top of or near an infant may increase SIDS risk 21-fold.) Once your child is over one year old, adding in a pillow, a blanket or a stuffed animal to her sleep environment is likely safe.