Unfortuantly it’s not that easy. They are definatly to young for a student visa. That is only college level and the collegae actually has to request them..so that’s out. As to the school part anyone can enroll in a us public school all you need is their birth certificate, but of course I don’t know how you’d get them in the country. If you solicit them as your siblings the wait is quite long for US citizens about 10 years..If u r a permanent resident the wait could be endless. If they are coming as a tourist well you know the drill only 90 days and they have to leave the country.

I’m sure that there are boarding schools in the U.S. they can attend, although at that age, I don’t know of any off hand.

Otherwise, they should wait until they are in high school and do a formal exchange program.

Besides, seven and nine is just too little for them to leave home and go that far away.

To attend a public school, their parents or guardians would have to live in the immediate area of the school. I’m sure there are some good boarding schools — private schools and quite expensive — that would accept them, but I can’t recommend any particular one.