Personalized Science Nerd Chemistry Toddler Hoodie. Science nerd Toddler Hoodie - Heather has chemistry beakers and bubbles for a scientist or chemist 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.