Personalized Good Planets Youth T-Shirt. Earth Day Youth T-Shirt - Vintage Royal Blue to support our planet Earth Day gifts with planet earth graphic says Love The Earth Good Planets Are Hard To Find. For conservationists, green and earth lovers. 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.