Mary, if you go to my website and click on "My Favorite Things" I have quite a few of my boy's pictures there.I have quite a bit to say about leadline class but I'll keep it brief. Yea, sure.
As far as outfits, I really do not care to see a little girl completely in black. I know that so many kids out there wear black, but on little girls, especially in the heat, I'd rather see them wear something lighter and brighter, on the top anyhow, and a color that matches the horse or a color that enhances the horse. Any color nice jeans with long sleeve co-oridnated blouse or long sleeve slinky is always nice on a little girl. If you do need to wear a dark color, consider navy blue in lew of black.
On boys, I don't mind black accents such as chaps, or jeans. But a lighter contrasting color for the shirt would be good. Again, I hate to drag the little kids down wearing too much black.
It's out of style pretty much now, but my leadline team of boys and girls all wore tuxedo shirts at the big shows with metalic or sequence vests that we had made and ties that matched the vests. Hair was always out of the eyes and pinned back away from the face neatly, no hanging ends, braided in a french braid or a bun. No hanging hair pony tails, all hair up. Sometimes, a tiny tiny bit of blush or lipstick, but I mean tiny.
It is a real plus for the leader to match the leadliners outfit as much as possible. Duplicate outfits look great.
The proper way to outfit the horse is to bridle the horse first with his bridle, then halter on top of the bridle, bringing the reins up and through the halter to the rider's hands. Do not hook a leadrope to a bit.
The child should be well aquainted with his "steady" and seasoned mount before hand, and want to be in the ring to show in the first place. They should be well practiced before hand. The child should be well rested before his class; fed, had a drink and a last trip to the potty!
He should know how to ride his mount and not be just "seated" and bobbing along. That being properly seated, not slouching over, legs, heels, and his hand(s) should be properly held on the reins in appropriate position. He should know how to neck rein in both directions, he should know how to "crawl" up the reins with his fingers and back the horse up by himself, and he should know the cue to whoa the horse and actually do it!. When asked to do these things in the ring, he should go through the motions of doing so and not just be "pulled" around by his handler, just guided. His saddle should fit him and rider both. He may be spoken to by the judge and should be able to respond to him nicely, other than nodding his head. He should be able to speak to the judge. He should know the horse's name and age and his own number that is pinned on him. Pick an easy number for him that he can easily remember. Having a "mock" show at home is a great idea. Have some other friends over to lead other horses, have them go around in both directions, line up, call names out etc. There are always lots and lots of bloopers in the leadline class and it's important to just keep cheering those little kids on no matter what! They are all winners!