Using the Outward Hound Reversi-Balls is easy. First, let your dog sniff around to find the spike ball inside the cute outer shell. Once they've discovered it, you can toss the ball for a game of fetch. The ball has two looks - just flip the plush fur shell inside out to change its appearance. There's also a squeaky spike ball inside to keep your dog interested. As for maintenance, since the toy is durable, it should last a while. But remember, no toy is indestructible. Don't leave the toy with your dog when they're unsupervised. If you notice any damage, remove and replace the toy right away to keep your pet safe.