hi. i tought children, nervouse adults, and the disabled. i think that it is wonderful that yo are worried about this.
children and horses should be together.
in my experience it is in the horses nature wether or not they are childrens companions or not. i have horses that with me, are full of life, they are playful and young at heart, but when there is a disabled child near, they become a placid quiet bombproof horse. i dont know how they sem to know, but hey just do. they sence the innocence.
in saying that though, just like there are people that do not do well with children, there are also horses that are not good with kids. they are just not interested.
by the sounds of your horse though, he is able to decern what is required. these are the special horses that you just love for ever!
it is not anyone elses decision what you encourage from your horse, but they will show you the direction they want to take. horses are great teachers, and children are supprisingly good at communicating their needs well to horses. and horses tend to understand that a chil is a child.
i dont think i have been very helpful, but look at this photo maby. this horse was far from a childs pony, and still is when with adults.
i hope something i said made sense. i am sorry i have been awake all night with my teething baby.