Personalized Bulldozer 1st Birthday Toddler T-Shirt. 1st Birthday Bulldozer Toddler T-Shirt - White has number 1 and room to add a personalized name for your one year old on their birthday party day. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.