I am not too sure if it's a good idea to interview them or bad as I don't have much research or knowledge about education system. However, I know I was interviewed as a pre-schooler during those days. And even my parents were. Our school was following central board system and there were tons of subjects including learning Hindi and Gujarat languages (apart form english) since grade 1st and sanskirt from Grade 5th which most schools started from 8th. Ther academic was very stressful and extrac curriculam too including aryurved, cookery, humanity, yoga, etc. were part of our acadamic studies and then extra activities were cumpolsory like tae-kwon-do, skating etc. etc. So they wanted to make sure that kids could cope up with all these intense work and wanted to make sure parents were educated enough to cope up and teach their kids. Usually they required parents to have degree in english medium and neither of my parents had that ..they both had graduated from gujarati backgroud, but somehow i still managed to get in. And then i had couple friends who dropped and changed school from grade4th, 8th, etc. just 'coz it was too much for them and they could not cope up. in such case, i would think it makes sense for them to interview.
But I still think that pre-school is too young of an age to interview kids. I still don't think that my school (discribed above)should do this. If kids think that they can't cope up they can always quit and change school, but interviewing just to know if they know enough english, enough abc, 123 etc. is not fair. what are schools forthen? its' like it has become tradition to take tuition in india 'coz everyone does and school teachers dont teach much. this is not fair. why would "most" of the students have to take tutions.....why parents pay money to schools. they should be prepared for teaching kids abc, 123 and help weaker students. Slowly the meaning of school is also changing to one of business these days. donations, tuition money as extra income..its just loosing its value of school as "vidya mandir" and teachers as "guru brahma guru vishnu"......