What were the things before plastic?

Did centaurs really exist a long time ago? Were penguins alive in the Jurassic era? What kind of animal is Nadine from Arthur? What were the dominant organisms living in the vendian time period? Do fossil fuels take a long time even millions of years to develop? Who was the mythological beast ladon? What was kiowa clothing made out of? On Poptropica how do you move the goat in mythology island? When did Paleolithic start? What is the age graptolites? Do you have to wind your fossil watch? Which is not an example of fossil fuel? What tools witches did use? What was the story of leprechauns? Is there any alternatives to bonjela? What food and livestock from the rest of the world traveled to the America? How fast can woolly mammoths run? How do you get into posiedens lair on Mythology Island? What was the name of the People who make barrels and casks? What were the first fish like?