Personalized STEM Science Technology Engineering Math Girl Toddler Hoodie. Engineering technology math and science design says STEM girls get stuff done on this Toddler Hoodie - Heather The Toddler Pullover Fleece Hoodie keeps little ones cozy and comfortable through all their adventures. Made with soft fleece and a smooth jersey-lined hood, it’s perfect for layering on chilly days. Ribbed cuffs and waistband help hold in warmth while side seam pockets add a touch of practicality for busy toddlers on the go.