My kids play on this site all the time. Other kids are of course very blunt (and kids love cursing once they find out it exists) but they have recently added hashtag censoring. Inappropriate usernames are picked up slower than usual but profiles are deleted. I've noticed a lot of older kids (19 and such) playing, and their age makes them act rudely towards the other kids. Pretty good site. Don't waste money on the little Builder's Club, though.