How to play: First, have Cavity Sam's dog, Rex - Ray, who has eaten some bad things. Drop an ailment into the dog's mouth. Then use the magnetic Dog - o - scope to guide the ailment along his belly. Try to get it out of his tail end. If the buzzer sounds, the ailment drops. If it falls out of his belly, your turn is over. Each time you remove an ailment successfully, you get a point. The one with the most points wins. Note: Be careful not to let the buzzer go off too often. Maintenance: Keep the game in a dry place and make sure the magnetic Dog - o - scope is clean. You can use a soft cloth to wipe it if it gets dirty.