My little son is semi-fluent in russian, and I and his mom want to be sure he builds on his limited ability.
=== must be fluent native russian speaker ====
It is his first language, but since we live in the US and I don't speak it, it's pretty rusty... so...
ideal might be a nanny type good with kids, or even a parent who has a kid about his age who wants to learn english.
Important is a time that works though which would realistically be like 7pm-8pm USA Pacific Time (6am - 7am russian time or 6:30-7:30am), though on weekends that could be more flexible.
roger aka dad