SmartyKat Hum Singer Electronic Sound Cat Toy. Motion-activated electronic sound toy, with realistic hummingbird sounds and fluffy feathers, sparks the thrill of the hunt, enticing cats to play. Iridescent blue crinkle, feathers, and soft plush offer multiple textures to attract and entertain cats. Perfectly sized to bat, pounce, and excite. Hunting cat toys help satisfy a cat's natural desire with safer and kinder prey.