10th Birthday Sport Champion T-Shirt. Funny ''This Little Champion Is 10'' Sport Champion birthday Boys party shirt for 10 year old''s birthday. Perfect Soccer bday party gift for Boys who are Sport Champions! 10th Birthday Gift Boys Sport Champion T-Shirt for 10 year olds birthday. Original Sport Champion artwork with funny text - and a classic Sport Champion Baseball image. With long lasting inks onto a super-soft T-Shirt for maximum comfort.