Well, I am not sure about the sticky note thingy. It depends on how well she can read . But having her ride with her eyes closed (with horse on a leadline, of course), having her do "airplane" with her arms, count foot falls, do all kinds of things with her arms like windmilling them or pretending to be a cheerleader or leading a marching band. Reach around and touch behind the saddle. Feet out of stirrups. Try to steer the horse with your body (dont' tell her how to do it, but let her try to figure it out intuitively and see if it works)
Have her sing some songs.
I know there are folks on here who teach little kids. I am teaching a 14 year old now, but she is like a young adult.
All great suggestions! I have a few more.
Definitely all on the lunge line for awhile, I don't give little ones reins for a bit and just focus on finding balance in the saddle. Do the "airplane" then have her touch her nose, her ears, her helmet, etc. They relax and don't really even realize they are riding. Stretching while standing, to the ears, to the tail (provided horse is dead calm with it) Stretching across the body to the opposite leg eventually shooting for the bootheel. Scissor kicks. I spend a fair amount of time on small talk with them too. There is only so much to repeat at that stage so it helps keep it moving along and they get comfortable with you. If they are telling you how so & so got in trouble on the school bus, nerves dissolve.
My little ones love to play polo with a yoga ball & pool noodle. The game is to keep the ball between me & the horse while on the line and once off line I set up cones for goals, then progress to weaving through them.
They also love to play the "mummy game". I give them a roll of toilet paper and let them wrap it around me. It's great when they are starting to learn steering & control. Party streamer rolls work too, but they seem to find humor in toilet paper.
Hope that helps, sure I can think of more but I am going to head to the barn and brush and rub and looooove on my new horse