Personalized My 1st Earth Day Environment Celebration Party Toddler T-Shirt. Celebrate baby's 1st Earth Day with this cute Toddler T-Shirt - Heather and Royal that has a plaid blue and green planet logo. Perfect for an Earth Day party activity. 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.