Personalized Monster 3rd Birthday Baby Bodysuit. Cute 3rd birthday Baby Bodysuit - Apple Green with a funny cartoon purple monster, stars and polka dotted number 3 says THIS LIL' MONSTER IS THREE! Our unisex one piece baby bodysuit make great gift for newborns, babies, infants, baby showers and expectant moms. An ideal gift for any new parent who will want one in every color.