I'm a pensioner and I bought two 'Stress Pauls' as I was unlucky enough to break both my wrists (needed plates & screws in both !). Even before having my plasters removed I wanted to have something to manipulate between my fingers to stimulate faster healing post-operation, by having to use the tendons in my fingers. I felt that a stress-ball product with an irregular shape would be more helpful than a conventional round ball. The Stress Pauls turned out to be ideal. As the strength in my fingers started to return, the little chaps could be squeezed harder, and the irregular shape meant the fingers were able to manipulate the little helpers in a way not possible with a ball. My guess is that use of two Pauls has speeded my digital recovery/dexterity significantly (the guy in the plaster room at the hospital even suggested using a computer key-board would be beneficial).
An excellent little product, and they also feel a good item for the intended item of stress-relief (Also, my grandson in Australia has mild ADD, and has been advised to use a stress ball product to manipulate in his spare hand when doing school work. The irregular shape of Stress Paul would be ideal in the classroom situation because if it's dropped, it won't roll away !).