It would of course depend on your client’s own fitness level, etc. In general, it may be helpful to assist the client with activities of daily living–movements that are exercises, but functional. Sitting down and standing up (squats) can be done with a bench, chair, or stability ball against the wall. Keeping the client moving is a good step, but also helping them to understand an awareness of their body.
I’ve read some really good material from Rochelle Rice. Here is a link to some of her articles that may give you more specific information:
I hope these articles can give you some ideas.