I watch while mine are playing with toys in the beginning. As soon as they start to rip them I put it up. It doesn't take very many times before they figure out that destruction = a loss. That way they can have lovely stuffies that last for years and they learn to play gently and have just as much fun. Pepper was the toughest, her horsie has one missing ear, and one lost eye, but after that it has become the love of her life.