Thank you for your comment krab.

I am writing from Perth with an impressive understanding how you have searched a way of exercising your dad's hand.

In fact, I would recommend that performing physical activities as leisure tasks or activities of daily living make an effective way to improve your dad's hand functions.

A part of hand exercise is good, but please let your dad thinks more how controlling the affected brain area and both hands into usual living skills. This is such one technique in various neurological rehabilitation programs.

However, I am pleased to consult any problem on your dad's living skills right now to my staffs at Mahidol Uni. Alternatively, you may visit two websites at http://www.pt.mahidol.ac.th/ot/ or http://www.otat.org/

Kind regards,