We lost DS2 (7,with ASD) at a theme park today. Totally our fault - we were watching DS1 on a ride and talking to my brother and sister-in-law - and we suddenly realised Ds2 had vanished. He was probably gone for 15 minutes before two of the rangers found him (they were completely brilliant) but I have never been so scared in my life. He hasn't run off anywhere for over a year (and that was only down the road) and normally sticks very close to us, we don't have to hold his hand, follows when we call etc. But this has been a real wake-up call. I know the best safety method is to not allow this to happen, but wondered if any of you use identity/safety devices when out and about. Need pros and cons really.