Fluffy blankets or pillows are smothering hazards and should never be in your child's crib. Other threats: An outdated crib (one whose slats are more than 2 3/8 inches apart, which could collapse or catch baby); or a mattress that's too soft (another suffocation risk). Also avoid danger spots within reach of your baby. In a few months, your little athlete will be standing while holding the crib rails, and things like plants, artwork, lamps or even blinds (the string is a strangulation hazard) become dangerous. Don't hang mobiles too low (it should be 10 to 12 inches over the crib for a newborn), or put a crib mattress too high for your older child (it potentially allows an adventurous child to climb the rail and tumble out).