Personalized Big Brother Astronaut Toddler T-Shirt. Big Brother Astronaut is so cool, he's riding a skateboard on the moon. You really have to look up to him! Cute gift for any big brother with big dreams. 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.