If you are trying to reach grandmothers, I would look beyond the online world. Of course, you could use something like facebook or go to popular baby boomer sites. However, I think you may get better results by thinking more offline and seek out grandmothers where they congregate. For example, you could put up fliers or contact church groups in certain areas. You could also contact local library services to see when they offer computer services. If you want to stay online, I would also attack it by looking at the common interests of grandmas. This could be things like scrapbooking, cooking, sewing, bridge, etc. Basically, look at those sources online or locally to find other possible leads. Also, you could contact the grandmas that are listed on this site: Rent a Grandma | Hire Nannies, Child and Pet Care Jobs. I believe I even saw this one advertised on that business sharktank show.