“Your”? …No, this is plural. When you are addressing multiple children, and you want to indicate that the item belongs to all of them, it had better be clear the first time.
“Your guys’“
“You guys’s“
“All y’all’s” …. Maybe in the South.
Anyone?
“Your”? …No, this is plural. When you are addressing multiple children, and you want to indicate that the item belongs to all of them, it had better be clear the first time.
“Your guys’“
“You guys’s“
“All y’all’s” …. Maybe in the South.
Anyone?
Out of Babel 
Oh, good point … I think I use “you” (+ energetic flailing gesture), “you guys”, “all of you”, or “everyone” … I think?
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“+energetic flailing gesture”
“You guys need to pick up your” (twirls finger over head like a cowboy twirling a lasso) “… Legos.”
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That’s precisely it! 😀
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“All of yours” but “all y’all’s” is better.
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Ah hah! You’ve discovered the ONE weakness in the English language 😀
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Other than this, I have few complaints.
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