According to my mom I was 11. And that means I was "in charge" of my younger sister who would have been 7 years old. I was a very responsible kid. Took care of the animals(dogs, cats) then the horses when they came home when I was 14. And I know at least two sets of parents that leave their 7 year olds at home after school from 2:30 to 5:30/6 at night. Both have younger siblings that are in daycare til mom/dad picks them up and brings them home. They just leave them with snacks and tv/games and tell them the "basics". Lock doors. Dont go anywhere or let anyone in. If there is an emergency go to the neighbors and call 911. I am also wondering ,,, since I just my husband and I were just talking about it, and I just read an article on "what age is appropriate" for giving a kid a cell phone. I know that there are going to be kids in her KG class that will, at the very least have cell phones and IPods with them. We have already tackled the earring thing. She has to wit til she is at least 10. If she still wants them and can take care of them. Then she can get her ears pierced. But I am sure that this is going to come up again when she gets into school. So.. what age is appropriate for giving them a cell phone or a MP3 player?