The policy at the High Desert Museum does not allow children unattended in the museum. However, we have had it happen a few times. If we cannot reach the parents at home, the children must check in with the admissions desk every half hour, or someone goes looking for them. If they are behaving themselves they are allowed to be alone, if misbehaving, they are made to sit on a bench until their parents arrive. The parents are then told of our policy. We have had pre-teens left here to do research for school work. Once again they need to tell the admissions desk where they are going to be. A volunteer or staff member checks up on their progress. We have not had a problem with children 15 years and younger bringing in smaller children. Visitors need a car to get out here, so usually an adult is with them. If they are old enough to drive, they should be responsible enough for their charges. I hope this helps. Karla Glanzman Sales Director The High Desert Museum Bend, Oregon USA