Personalized Chemistry Small Heart Youth T-Shirt. Chemistry text with a heart dotting the i in chemistry is a fun gift design for teachers, students and chemists at back to school, 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.