Personalized 3rd Birthday Train Outfit Newborn Layette. 3rd Birthday choo choo train Newborn Layette - White boys clothes party or photo outfit has colorful train with red engine and number 3. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months