Personalized Kawaii Octopus Nonna's Sweetheart T-Shirt. Kawaii Octopus Nonna's Sweetheart is the perfect design for the octopus or kawaii lover in your life! This design features a sweet octopus grandma with her grandchild, surrounded by the phrase "Nonna's Sweetheart" in a fun, kawaii font. The design is perfect for family reunions, Mother's Day, grandma's birthday, or just because! 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.