Personalized A New Adventure Youth Long Sleeve T-Shirt. When you try something new, you might discover your next great adventure. A New Adventure Youth Long Sleeve T-Shirt - White, perfect for little explorers and fans of "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)