Your dog requires lots of toys to keep him busy and stimulated. There are a number of different kinds on the market, both in local pet stores and on the internet. Offer your dog toys that he can use alone, as well as pull or throw toys that you can use together.
One of our favorite toys is homemade - just the right price. Find three old socks (most dogs would prefer them unwashed!), and place two of them inside the third. Position them in the middle and tie a knot on either end of the "stuffed sock." We call this the "sockie toy." This toy is a wonderful pull toy. Remember, your dog wins when he pulls the 'guts' out!