The kids taking care of the horse will definitely help the twins get into the saddles. The two smaller horses are a gentle ride and much smaller than the one Jack is riding.

"This is Sabre." He glances back at the two the twins are on. "Mocha and TimTim are the those two. The kids take them out all the time."

Jack starts them walking slowly and the other two horses naturally follow his. The twins don't have to do much right now but stay upright in the saddles and get used to the rolling motion of a horse.