It depends on how
Mauture your 12 year old is.
Depends how responsible the 15 year old is in your point of view, and if you think they'd be responsible enough to have your childrens' lives in their hands.
10or older
As long as you can trust them. I am 13 I have been babysitting since I was about 11. You should have a way to contact the kid and have established and emergency exit plan.
Depends on the laws of the country you're in. Often there is no legal limit on siblings looking after each other. But if things go wrong, the parents can be charged with negligence.
If you have siblings then play with them if not play with some toys or watch TV that's what my 8 year old brother would do
While there is no law to say yes or no, the authorities are not going to look at this favorably. There are several reasons: Most people believe a 12 or 13 year old can be left alone for a few hours in the day. The 9 year old is going to disobey the ten year old. The 10 year old is not old enough to know what to do in an emergency.
Depends what year...
yes a ten year old can watch it only with an adult.
There are several things to consider in this situation. One, if the epilepsy is under control or if there is a chance that the child will have a seizure. Also, consider how mature and capable the 13 year old is and if they have been babysitting their siblings at other times. Also, the age of the siblings and if they know what to do in case the 13 year old has a seizure. Another thing to consider is how close the parents will be or if there is a trusted adult who will be near by in case of emergency.
No
it matters in what year you're talking about
Yes she does, she has a 53 year old sister and a 60 year old brother who are also actors.