Children who have to wiggle can easily find their place with these inflatable cushions. wonderful for balance and posture. Increase or decrease the air for perfect seating arrangement. requires a hand pump to inflate. Perfect for a classroom utilizing flexible seating. Great sensory and special needs item. 13" tactile cushion is for ages 6-18. Tactile spikes are 1/4" apart on one side with smooth, slightly raised bumps on the reverse.