It depends on what your career goal is: if you want to get back to the hospital then a refresher program followed by a New Grad residency is an option. But, this often means doing rotating 12hr shifts, holidays, etc and not the best balance for family life. If that matters then I'd encourage you to look outside the hospital.
It's true that many clinics hire Medical Assistants now, but some private practices still have RNs. Find out if you will be the only RN on staff--I think you need nursing colleagues around while you gain experience (an advantage of the hospital). Ask around at your church and connect with old nursing school
classmates. Check out career fairs at a local university. Meanwhile, you need to show that you do have relevant experience as a stay at home mom.
1. You can volunteer or work at a summer camp (some are easier but others can be very intense!).
2. Ask your childrens' school or scouts club if they need a nurse to chaperone outings
3. Volunteer with the Red Cross or a church health fair
Wish you the best!