Again you could look up 'recipes for kids'. Maybe you could make chocolate crackles or something else that sets without an oven, and things that don't require sharp knives. One of the patients mentioned they used to have cooking classes. You could look up 'craft activities for kids' in your local library as these don't usually need sharp objects. It was something nice to give to their families. There were also plaster figurines with paints for the patients to paint, and then glue on magnets. I'd suggest paper and pencils for free drawing (it's very interesting when patients draw their hallucinations) and you can guess their mood by what colours they use.
I've just come out nursing in a subacute inpatient mental health ward (my clinical placement for two weeks).