Jake probably has about 75 toys, and he still plays with all of them. I got him a dog house bed, and he stuffs all his toys in it.
He still has his very first toys that his breeder gave him and, in fact, he pulled one of them out the other day and was so happy to see it.
He plays with toys ALL the time...he loves loves loves toys!
Try putting some of them away for awhile and bring one out periodically and see what he does.