Personalized Hoot Owl I'm Going to be a Big Brother Toddler T-Shirt. Whether your little one is preparing to welcome a baby brother or sister, this cute and funny design will surely bring smiles and laughter. It's a wonderful keepsake for parents and children alike as they embark on this new adventure together. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.