Whether you're looking for an organic twin mattress or maybe a full size mattress for your child, some of the best options are the Suite Sleep Little Lamb series or one of the Naturepedic organic kid mattresses. Suite Sleep offers an all natural latex mattress designed especially for kids, but it's super comfortable for those times when Mom or Dad happen to be in bed with their little one. Suite Sleep also offers an innerspring kid's mattress, the Little Spring, which features a pocketed coil spring system topped with natural latex to add additional comfort.
Naturepedic has a Quilted Deluxe line of organic cotton and innerspring organic mattresses. This Naturepedic line even offers a 2-in-1 option with one side quilted and one side waterproof. Recently they've added a pocketed coil mattress that provides a comfort not found in a traditional spring mattress.