These jelly-like devices have been quite useful in helping students in feeling of maintaining a firmer hand grip with minimal force or tension (without dropping it or squeezing it) in their playing. Some young ones even claim to suddenly be able to play much faster and efficiently once they get that sense of a firm hold in their palms! (And yes, I am just as excited as they look, if not more!)
Students, our target is to have that firm hold by the end of this month, keep up the marvelous work! Proud of you all.