Beautifully made and incredibly versatile, 4-in-1 Crib features gentle curves and sturdy construction that can be converted for use as a toddler bed, day bed and full-sized bed. Safe, sturdy, and easy to assemble. $180 Baby mobile crib attachment Features: Plays Music Power Source: Hand Crank $20 The crib plus the mobile crib attachment for $190 or you can buy single pieces.