These toys seem to be safe and stimulating when picked out accordingly, but are suitable only for the fairly young pups.
Here are some samples:
Above: these little towels, blankets make excellent toys for the little ones to chew, and pull on.
Above: these are crib blankets, I call them sculptured blankets.
Above: teething rings.
Above: teething cloth.
And here we have the wrong mom checking out the Elephant blanket for our babes.
P.s. I find those things in the Good Will Store. They allow small dogs here, if remain in the shopping cart, I take a couple of Paps with me and fill the cart up to the most with things for them!!