Personalized Kawaii Narwhal Grandpa's Sweetheart T-Shirt. Looking for a gift for your grandchild that is both unique and meaningful? Look no further than the Kawaii Whale Grandpa's Sweetheart design. This cute design is sure to put a smile on your grandchild's face, and the grandparent/grandchild relationship is celebrated in the design. The Grandpa's Sweetheart design makes a great gift for any occasion, including baby showers, birthdays, and Christmas. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.