Check out for some cute Hello Kitty booster car seats below. They look so girly and cute, perfect for any children who love Hello Kitty. The first booster car seat featuring picture of Hello Kitty and some flowers. The seat material is polyethylene and cover material is polyester. The size is approx. 15 x 15 x 8 inches. The second booster comes in pink and black colors and it has 2 cup holders. What a cute boosters.