The rattling lemon ball will roll around on the floor with the cat right after it! Its rattling sound stimulates play-time! Grumpy Cat became an internet sensation in 2012 after her owners posted a picture online of her grumpy face. She has since become an internet celebrity all over the world. Our Grumpy Cat range are official licensed products made from only the best quality materials and textures, including catnip filled cat toys and a floppy plush cat toy.