Anyone have time to give thoughts on this very short children's piece?

Hello! This is my first post. I'm about to send off a manuscript of very short stories for small children and there are two things I cannot decide on, grammar-wise. I may have even written grammar-wise incorrectly. See, grammar is not my gift. Anyhow, this one story is a bit awkward but I really want to keep it in the collection. And the two sentences following that story are perhaps also awkward. Any feedback would be so appreciated. Thank you!

Once there was a little boy who asked a little girl if she wanted to play, but the little girl said, “No,” and the little boy’s feelings got hurt. A few minutes later, another little boy asked him to play, but because his feelings were still hurt, he didn’t even hear the question, and so this other little boy got upset and yelled, “Well, fine then. I don’t want to play with you either!”

A little while later another little girl asked the angry little boy to play, but all he could say was, “Go away,” because his feelings were still hurt, and the little girl started to cry.

Then another girl walked over to comfort her, but she was so afraid this new girl was going to be mean that she cried for her mommy, and this new girl got upset.

Then, a little boy asked this upset little girl if she wanted to play and she thought about it and said, “No,” because she was afraid she might have misunderstood the question. And so on and so forth until every little boy and every little girl in the whole wide world was upset.

Well, except for one little girl at the playground, who noticed a little boy all alone and asked if he wanted to play. Because the little boy’s feelings had just been hurt by someone else, he shook his head no. But instead of getting upset, this little girl decided to do something different. She asked him a question. “Is there something wrong?” she asked the boy. “Are you upset? You look upset.” And the little boy nodded yes. And so she asked, “Do you need a friend?” And the little boy nodded yes again. And so they played and played until some other boys and girls asked if they could play too. And they said, “Yes, of course you can!”

And pretty soon every boy and every girl in the whole wide world were playing together again.

The End.

And the little boy wished he hadn’t heard what she was saying. But he did hear. That this three-legged cow had belonged to her great grandfather. And that he’d played with it when he was her age. And that his son had played with it. And his son. And so on and so on. Basically, he found out that this toy had survived like a hundred years without any damage other than its missing leg.