Personalized Future Motocross Champion BMX Toddler Long Sleeve T-Shirt. Motocross biking sports clothes for boys has helmet and rally flags with future motocross champion quote. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.