Personalized Submarine 3rd Birthday Toddler Hoodie. THINGS ARE LOOKING UP 3rd birthday Toddler Hoodie - Royal Blue with big number 3, colorful submarine, little deep sea explorer in the porthole and bright fish with bubbles. 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.