I think my 7 yr. old daughter is ready for longer bike rides. In the past when we go for longer rides she complains about her butt hurting. If you've ever tried sitting on the seat that comes w/ a standard kids bike you know they are brutally uncomfortable. Does anyone have a recommendation for a saddle for a child? Preferably something cheap. I do plan to get her some padded shorts for Christmas so hopefully that will help too.