Does anyone have any experience of playing lap harps? I am tempted to get my hands on one as I want to play a harmony instrument that isn't piano or guitar, that doesn't cost too much and isn't too big - I thought a lap harp might tick all boxes.

I'd like to learn to play simple-ish folk/early pieces in particular. I also thought it might be interesting for children at school to see and hear and may have benefits to me in terms of reducing blood pressure!
Any thoughts/comments/advice welcomed!