Personalized Don't Push Youth T-Shirt. Nuclear Engineer, Don't push my buttons in a radiant yellow oval is a humorous design for nuclear engineers. Fun gifts for birthdays, holidays and graduation. 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.