Treat Dispenser: The perfect sized opening dispenses treats or food as your cat plays. Doubles as a slow feeder and helps to promote exercise and a healthy diet. Tumbler Design: Rounded bottom rocks back and forth when pushed, batted or swatted. Rocking motion encourages a cats natural instinct to hunt and play. Lights Up: Led light attracts cats to play. Light automatically shuts off when cats stop playing with the toy to save battery power. Batteries included. Easy to use and Clean: Simply twist off the top, add treats or food, and replace the top to secure. Top cannot be easily pulled off by your pet. After use, twist off the top again to wipe the inside clean. Relieves Boredum: Keeps cats entertained and occupied longer, while helping to relieve boredom.