They can weigh more than one ton. Small stones are as big as dinner plates. Rich people don't carry the Yap stones. servants follow the rich people. Each servant carries a stone on a pole over his shoulder. today people on the island use paper money for everyday shopping. But for other things they still prefer Yap stones. Money has changed a lot over the years: from feathers to Yap stones to today's plastic money or credit cards. Money has become a very important part of our lives. Just take a look around you and you can see how important it is.