Personalized 3rd Birthday Outfit 3 Year Old Girl Unicorn Toddler Hoodie. This cute three year old birthday design for toddler girl has unicorn face and I'm 3 quote. 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.