Attach a mobile to the crib rail when your baby is an infant, but remove the mobile when your baby can sit up on his own.
There are some beds that use wood as the base frame but have aluminium or steel accents to make it stand out and look stylish so you don't always have to make a choice between the two as they can complement each other well.
Choose a set that's from a reputable company, so you're sure it's made with your baby's comfort and safety in mind.
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