Personalized 3rd Birthday 3 Year Old Cute Whale Toddler T-Shirt. Cute 3rd birthday Toddler T-Shirt - White with I'm 3 quote and number 3 with funny whale. 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.