Something for the staff room/rest area which the staff from all different shifts can enjoy?
Something with some permanency like a new noticeboard/kettle etc? (You could make a few enquiries .... bet there's something they haven't got round to clubbing together for) ....... Or a selection of herbal teas and speciality coffees .... ????
I agree with TinaT - it's expressing the thanks that's important, not necessarily the gift ...... on one occassion I was so impressed with my mother's care after a lengthy period on a hospital ward I wrote to the Hospital's Chief Exec with my observations of the high standards generally and in particular specifying a couple of personnel I felt were oustanding in the hope, if there was no 'award scheme' for the staff, the record of mine and mum's appreciation was permanently on their personnel files (and copied to the individuals). A 'morale boost' costs next to nothing but is probably the most appreciated of all?????
Great news your mum is well enough to be discharged,
Love, Karen, x