Personalized Trombone Player Childs Music Toddler T-Shirt. Daddys Trombone Player Toddler T-Shirt - Mauve musical instrument future trombonist music gift. 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.