Personalized 3rd Birthday Construction Truck Bulldozer Youth T-Shirt. Cute 3 year old boy birthday party Youth T-Shirt - White with number three and bulldozer design Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.