What is the difference between a mini quad and a quad?

I am looking to purchase a quad for a first time rider. It's for a child and I am wondering if the mini quad is just smaller hense the mini title? Or is it like those mini dirt bikes that look like tiny ninja bikes? The engine sizes are the same I think (on the quads) so Im just wondering exactly why the mini in front of it?
What is the difference between a mini quad and a quad?
i assume a mini quad is like a mini moto.a bit to small even for a child realy.if your child is only young go for an auto with restrictable throttle.some quads for children even have a cord that raps round your wrist so if your child takes off it pulls out and cuts off the engine.
What is the difference between a mini quad and a quad?
a mini quad is the 4 wheel ver of a pocket bike from 50cc to 110cc ish top speeds are about 35 screeming, Yes its the 4wheeler ver of the "tiny ninja bikes"