what are the different types of yoyos?
['Shape. Yo-yos typically come in three shapes; butterfly, classic and modified. ... ', 'Material. Most yo-yos are made of wood, plastic and/or aluminum or 24 carat gold See Yo-yo Materials.', 'Axles. These can be fixed axles (usually wood or polished metal) or transaxles. ... ', 'Response.']