The only things that should be in the crib are the mattress, a tight fitted sheet, the infant, and a pacifier (if used). Blankets should never be in a crib with an infant.

Only mattresses designed for the specific sleeping environment should be used. Mattresses should keep their shape even when the fitted sheet is used. Make sure your cribs are safe by checking your licensing rules and the resources at the end of this training. 

Soft or squishy objects placed with an infant for sleep can increase the risks for both SIDS and accidental suffocation. Examples of these objects are pillows, blankets, quilts, comforters, sheepskins, stuffed toys, or bumper pads. Having an infant sleep on adult sleep surfaces such as waterbeds, couches, and armchairs, can increase those risks too.