Personalized Pi Day March 14 Math Lover Science Toddler Hoodie. Whether you're attending a math-themed party or just want to express your geeky side, this Pi Day apparel is a must-have. Grab yours today and wear your love for math proudly! 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.