Personalized Scientist Chemist Eat Sleep Science Repeat Youth T-Shirt. Science teachers and students will laugh at this eat sleep science repeat design that is great for a biologist, chemist and more 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.