Personalized Happy Clam 2nd Birthday Youth T-Shirt. 2nd birthday HAPPY AS CLAM 2 YEARS OLD I AM Youth T-Shirt - White with smiling pink clam in a purple shell blowing bubbles. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.