Personalized Chemist In Training Childs Toddler T-Shirt. Cute chemist in training Toddler T-Shirt - Vintage Smoke has chemistry beaker design for a boy or girl wanting to be a chemistry teacher or a scientist when they grow up. 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.