Personalized Monster Truck 3rd Birthday Long Sleeve Creeper. I'm Three! A red monster truck drives over the words. Great third birthday gift for your 3 year old who loves trucks. 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.