Personalized Birthday Mermaid Girls Party Toddler Hoodie. Birthday mermaid Toddler Hoodie - Royal Blue girls party photo idea with blue mermaid tail. 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.