Slumberkins Hammerhead Dad of the Birthday Boy

This fun and coordinated birthday shirt design features the cheerful Slumberkins Hammerhead character paired with soft pastel blue tones and playful lettering that reads “Dad of the Birthday Boy.” The clean, centered layout keeps the design modern and easy to style, making it perfect for celebrating alongside the birthday child. With its friendly hammerhead expression and calming color palette, this design fits beautifully with ocean- or shark-themed parties while still feeling comfortable and wearable beyond the celebration. It’s a great choice for family photos, party moments, and matching outfits that tie the whole birthday theme together in a sweet, Slumberkins-inspired way.