The common scratch ball toy is easy to adapt for children who have a weak grasp and/or cognitive delays. I put the ball inside the mesh bag and tied it to the mitt. I ask clients to pull it off while riding. This is a great way to promote reaching and balance as well as hand skills. Best of all once the ball falls, it doesn't go far and its easy to set the activity up again.
Barbara Smith, M.S., OTR/L author of, The Recycling Occupational TherapistHorseot.com