Well someone finally got us beat. My youngest leadliner was 18 months at his first show.
Would you just LOOK at that smiling face! We have a born rider here for sure.
Another retired lead line mom here and yes please do grab those faker stirrups Laura recommends for your child and a helmut. You can get a western hat with a built in helmut also. Get him some little dress jeans and a dress shirt and tie, and some little roper boots with the round toe and off you go. Try to match his outfit.
To answer your question, yes his feet must be in the stirrups. And he is to hold the reins properly. The entire thing about leadlining is basically an equitation class to show the judge that your child has been properly schooled (no matter his age) to sit down on the saddle and sit up nicely, rein the horse in both directions, stop and back him. He should also be taught to respond to the judge should the judge ask him a simple question, such as "What is your horse's name, What's your name, What's your number, How old are you, How old is your horse, What kind of horse is that" etc. and your leadliner should be able to respond. We got caught with our pants down at our first show when Dan was asked at 18 months what kind of horse he was riding. For the life of him, he could not say "Appaloosa" and something about an apple and poo poo came flying out. Mommys are not supposed to really help. Mommys are simply a guide to lead the horse and a safety net. Just get him out there for practice daily and teach him. He'll learn fast.
Now please grab that most beautiful precious child and give him a huge hug and tell him its from his
cheerleader on the mountain. He's going to be GREAT!
PS: remove the back straps
This is a yes
http://www.youtube.com/watch?v=6CQ086CjlGs
This is a no