Combs, pens yes, especially toothbrushes! I always thought they were bone alternatives. Plus combs and pens smell like us and the Bs know their not supposed to do that which is a bonus. I've never seen them go after water bottles or other random plastic. Now soft paper! Like paper towels etc. That is great fun. Plastic and paper is also great. Once Cody got down stairs when my brother and family were visiting. They had two boxes of Huggies down there. Cody was so quite for a while. We found him downstairs and my sister in law yelped "It's a huggies massacre!" He had neatly "shredded not chewed" the contents of both boxes.