There are 2 days in a weekend. Which day do they come? If once a week, I think it's fine. But if it's twice a week then it's abit too much. Can restrict to once a week. What they're doing sounds quite ok la.. Not so bad. As for broken English.... if ur toddler is only exposed to it once a week, it won't really affect him. Just correct his English if he says something in broken English.
Read more