Personalized Hoppy You're My Grandpa Toddler Long Sleeve T-Shirt. I'm hoppy you're my Grandpa cute frog Toddler Long Sleeve Tee - White for a grandchild makes a great Father's Day gift idea for a visit to a grandfather. 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.