Mowing with child on your lap

was just mowing the lawn with my 3 year old lil girl last night. my lil tractor has so many guards on it i really don't see her getting caught in anything if she somehow fell off. she stands between my legs with her hands on the wheel. she is locked in place by my arms and legs. don't really see the problem.. sooner she can figure out how to mow the lawn it sooner i can stop.. :)