Personalized Best Niece Ever Unicorn from Aunt Youth T-Shirt. This cute niece gift is a fun baby shower gift from Aunt or Auntie with unicorn and quote that says best niece ever. 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.