ROCKERBOARD AND GYM BALL ACTIVITIES You could substitute the rocker board for a stool for the sitting down activities. These activities build core strength, left/right coordination and crossing the midline. Standing on the rocker board is wonderful for balance and vestibular sensory input (linear side to side or forward/backward). Add challenges to build core and upper body strength. We also work on motor planning and praxis. We can start with single actions and then sequence them. I like to add