My mother-in-law has been semi-confined to a wheel chair for quite sometime now. She undergoes physical therapy 3 times a week and I am confounded as to why she refuses to walk using a cane! She is gaining weight due to her immobility. I read that a roll about could aid her with walking. It's a sort of a one-leg scooter that could her get mobile. I think it's for rent for those with a temporary need for it. However, it is also for sale for those with a more permanent need for a knee walker. I wonder how much it costs.