american revolution american revoolution animation benjamin franklin bodies of water california capitals cities civil war colonies continents countires countries deserts dwellings economy explorers flag game games general holocaust jamestown jefferson lakes landmarks lewis and clark lincoln manifest destiny map mayflower missions mountains native americans news obama oceans oregon trail pilgrims pocahontas presidents presidents wax museum quiz reference research links revolution revolutionary war rivers ruby bridges slavery social studies songs states thanksgiving time tribes westward expansion white house world war ii