Personalized Kawaii Backpack 100 Days Smarter Long Sleeve Creeper. Long Sleeve Creeper - Pink with funny kawaii cartoon backpack with eyeglasses and giant pencil says I'm 100 Days Smarter. Cute 100 Days of School gift 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.