Okay kiddo, let me explain to you what wind and fire wheels are!
You know how wind moves things around? Like when you blow on a dandelion and the little white things go flying? Well, wind can also be used to make things move on purpose. That's where wind wheels come in!
Wind wheels are like big circles with blades sticking out of them. When the wind blows, the blades spin around and that movement can be used to do things like grind grain to make flour.
But what about fire wheels? Have you ever seen a campfire or a candle flame? Fire is very powerful and can also be used to make things move. Fire wheels are kind of like wind wheels, but instead of blades sticking out, there are little cups that hold fire.
You light the fire in the cups and then the heat makes the cups spin around and that movement can also be used to do things like grind grain.
So, wind wheels use wind to move and fire wheels use fire to move. Pretty cool, huh?