Personalized Superhero 3rd Birthday Pink Long Sleeve Creeper. Happy 3rd birthday! Celebrate your toddler's third b-day with this cute I'm 3 pink superhero design. Happy Birthday three-year-old! For chillier weather, dress baby in this soft long sleeve creeper in a great fitting 1x1 baby rib. 5.0 oz., 100% combed ringspun cotton, 1x1 baby rib. White is sewn with 100% cotton thread, Flatlock seams, Double-needle stitched rib binding on neck, shoulders, sleeves and leg openings,Reinforced three-snap closure on binding.