"You are definitely on the horse," he agreed with a smile. "Can you can your foot into the other stirrup?" he asked, and then realised his mistake.
"Yes, you will, because this is my silly fault," he told her. Now that she was sitting on the horse he could see that her feet barely grazed the stirrups. "See, I should have shortened it," he explained softly, before pulling at straps until her foot could rest in it with a slight bend in the knee.
He walked around in front of Annie, making sure to show her what he was doing before attempting to mess around on the left side.
"If you hold onto the front of the saddle for now, I can lead her for a little walk to get you used to the feeling without you having to do anything."