Personalized 4th Birthday Construction Truck Bulldozer Toddler T-Shirt. Cute bulldozer for a 4 year old birthday party comes on a Toddler T-Shirt - White for a little boy 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.