I have placed rubber bands on the knobs so the little man cant get into them. I had a cabinet that he was able to get into but I had to block it off when he started eating the jello boxes and dumping pasta on the floor.
With my other challenge of not having doors I placed items in them that he cant hurt (and that wont hurt him). I also placed all of his small items like child size spoons, sippy cups and wash cloths in baskets placed all the way to the back of the shelf. I am enjoying the challenge and love being creative. Soon he will be walking and I will have a new challenge.