Personalized 7th Birthday Ice Hockey Sports Party Boys Youth T-Shirt. Fun ice hockey themed 7th birthday Youth T-Shirt - Black with sports number 7 logo and I'm seven quote. 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.