Rewards work best from the very young to the very old. Whatever you do give out "gifts" for participation. This might seem like bribing but it works the best. This will get everyone motivated (especially) if the rewards are wrapped or hidden. I would suggest candy, items from the dollar store or everyday tools for the nursing environment. This will get everyone up and moving. You don't have to spend a fortune, but it will spark the inner child of many and that is always fun.:)