Personalized Behind Muggles & Mom Youth T-Shirt. Muggles and Mom westie terriers - A behind the scenes look from the making of children's book, "MUGGLES' NEW HOME" by Author & Illustrator, Kim Niles 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.