Bones are often thought of as the symbol of death, and this is partly true. Skeletons, skulls, and so on - this is what is depicted when we want to tell someone about a deathly danger or to show a dead person. However, curiously enough, these bone themed slots, most often, have nothing to do with death. Bones have been a very important resource for people living in the Stone Age, and this is what these slots are about!
So, alongside with the bones, you will often see stones, ancient people, ancient animals, and plants when playing these bone-themed slots. Do not get scared, though, even in case you see some skeletons or other death symbols: they are not after you here, they are just for triggering wins. Even during the bonus rounds, you may see a lot of bone symbols across the reels. Just match them and get paid a good amount of money - no need to do anything else!