We bought a two pack of maps (one US, one world) at Barnes and Noble a few years ago. I then bought some sheets of insulation board at the hardware store, cut to be just a bit bigger than the maps, covered them with fabric, used ribbon on the back as a hanger, and attached the maps to the front with very heavy duty double stick tape. It’s great because there is only one nail hole in the wall and the girls can look at them all they want. If they do happen to pull them off the wall, they won’t get hurt since the foam insulation is so light weight.
Crystal