This client loves to play card games, either with physical cards or on a tablet. They currently use a card holder which they hold in one hand and use the other hand to move the cards. This works but limits movement a lot and limits what can be done with that hand.

Your task is to design a device that can mount to an arm rest or wheelchair tray and can hold cards in place. It must be easily adjustable to reach the cards and must not block the communication board on the tray. It should have an interchangeable interface for the user to hold up physical cards or a tablet. Ideally it could be used for more then just cards.