The middos issues of the kids seem to be coming to the foreground early, and that is good in that they can be addressed quickly.
Six year olds, in my opinion, are a little too old to throw a quilt in the middle of the table.
Three year olds should not patch a parent. They are a little too young to become socialized like that.
The kids are demonstrating socially unacceptable behavior and disrespectful speech.
The parents, I suspect, are not instilling boundaries or discipline on a steady basis, in my opinion.
Either the parents realize “raising” kids is an action verb, or the kids will be like so many others who run around driving rebbes, and their peers crazy.