Wow. That’s not in scripture.
We know that there are angels, and that God sends them to do his will among his people.
Anything beyond that is pure speculation.
Definition of speculation: an idea pulled from one’s fanny, which can be wholly rebutted simply by saying Nuh-Uh.
Since you missed the post above, here is Matthew 18:10:
“Take heed that ye despise not one of these little ones; for I say unto you, That in heaven THEIR ANGELS do always behold the face of my Father which is in heaven.” (emphasis mine)
That children have angels assigned is implied from the above verse. What they are allowed to do or not, is not said.
Of course it is ... perhaps you missed it.
Exodus 23:20-23, Judith 13:20. Psalm 34:7, Psalm 91:11-13, Daniel 10:13, Matthew 18:10, Acts 12:14-15, Acts 16:9 ... along with other scriptural references. Take some time to get to know your guardian angel. You will not regret it.
Excuse me for speaking in frustration, but what does it take to get across to people like you not every Christian believes Scripture is the sum total of God's Word?
It's fine if you believe it is, but replies like yours sound exactly like being called a "racist" for not agreeing with a liberal's policy, to us of the more Catholic persuasion.
It's not a comment that is going to alter our opinions, and ultimately, all it does is serve to reinforce the pride of those who share your doctrine.