Personalized Nanotechnology Toddler Sweatshirt. Nano Technology is huge text with a magnifying glass on Toddler Sweatshirt - Heather make a funny science gift design for engineers, scientists and technicians working with the smallest structures. 7.5 oz. 60/40 cotton/polyester fleece. Coverstitch neck, shoulders and armholes. Coverstitch ribbed collar, cuffs and waistband. White is sewn with 100% cotton thread. Toddler 2T, 3T, 4T, 5/6, 7