Personalized Autism Puzzle Heart Youth Long Sleeve T-Shirt. Autism awareness Youth Long Sleeve T-Shirt - White with a heart filled with interlocking puzzle pieces. Autism acrostic outlines heart: ALWAYS UNIQUE TOTALLY INTELLIGENT SOMETIMES MYSTERIOUS. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)