These pieces are very heavy and very stable. You have to work to tip them over. Many of them make a jingling sound !! You can mix and match parts and get as creative as you want. Your hardware store may contain many more parts than mine did. Note that some of the nuts will have a fine thread. These will only thread a little bit onto the coarse threaded rod before they jam. That 's okay if those pieces are use for the tops, as in the bishop.