Personalized Mouse Youth T-Shirt. A great finder, a great helper, and a great friend. Mouse Youth T-Shirt - White from "Dog and Mouse" by Michelle Nelson-Schmidt wants to help, not because she has to, but because she wants to. 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.