Personalized Helping? That's my favorite and very best skill!- Mouse Toddler Long Sleeve T-Shirt. Great helpers come in all shapes and sizes. Helping? That's my favorite and very best skill!- Mouse Toddler Long Sleeve Tee - Light Blue, perfect for fans of "Dog and Mouse" by Michelle Nelson-Schmidt. 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.