Personalized Hippity Frog Birthday T-Shirt. T-Shirt - White with happy smiling frog on a lily pad with balloons. Text says HIPPITY HOPPITY HURRAY, IT'S MY BIRTHDAY! Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.