Erupting volcanoes. Thunder and lightning. T Rex waiting behind every bend. Your child (age three to six) loves learning about beasts of the Jurassic, Triassic, and Cretacious because the dinosaur world was one of constant excitement. Wouldn’t it be great if they could feel that same sense of excitement when they’re getting ready in the morning? Now they can with our awesome glow-in-the-dark Dinosaur Days Youth Crew Socks!64% Cotton / 31% Polyester / 3% Nylon / 2% Elastane.