Not sure if I am being overly anxious re this - my 14 year old niece took my 6 and 4 year old to the park for me at lunchtime, then asked if she could bring them back to her house to play with the dogs (sil and bil both out at work). I said yes absolutely, all walking, no major roads to cross etc. Then my other sil dropped her 10 month old over for a few hours for her to mind along with my two. She's very happy to do it but it seems a lot for a 14 year old to juggle by herself. If I'd known she was minding the baby I'd have said to drop my two home after the park.