Bought this for my mother who has dementia and she loves it.  I was concerned about her being able to use this  because she has limited use of her right arm due to arthritis, but she is able to pull the lever (sometimes with help from her other arm).  And while she can't use it for extended periods,  it definitely is something that she enjoys and keeps her entertained and there's not very many things that we've found that can do that so we are grateful to have found this.