Perhaps there could be a situation where the kids get into trouble, like accidentally releasing a small animal from a cage. Naruto would then have to use his quick thinking and ninja skills to catch the animal and keep the kids safe at the same time. This would show his ability to handle unexpected situations while babysitting.
One idea could be Naruto using his shadow clone jutsu to handle multiple kids at once. He could make clones to play different games with the children, like one clone for tag and another for hide - and - seek.
One possible plot could be Naruto using his positive energy to cheer up the orphans. He might tell them his own story of growing up alone and how he overcame difficulties. This would inspire the orphans and create a warm and hopeful atmosphere in the orphanage.
Kakashi could be an interesting babysitter. He has a lot of experience as a ninja and could teach Naruto a great deal while babysitting. He is also quite laid - back in his own way, which might be good for Naruto. Tsunade could also be considered. She is strong and could protect Naruto well. And she might be able to teach Naruto some things about leadership and responsibility while taking care of him.
His kindness would be a major trait. He'd be very gentle and patient with the orphans, always there to listen to their problems. For example, if an orphan is sad about not having a family, Naruto would sit with them and share his own feelings of loneliness as a child.
In a Ben 10 and Naruto fanfic, there would be some epic battles. Ben's alien forms like Four Arms could have a great brawl with some of the strong Naruto characters like Rock Lee. Four Arms' brute strength against Rock Lee's amazing taijutsu skills would be a sight to see.
If Naruto was the Juubi in the fanfic, there would be a lot of changes. First, his physical abilities would be off the charts. He could probably move at incredible speeds and have superhuman strength. His chakra reserves would be massive, which means he could perform powerful jutsu without getting tired easily. Also, the other characters in the story would probably be in awe or fear of him. His friends might try to help him control this new power, while his enemies would be even more determined to defeat him. It could also change the political situation in the ninja world, as having such a powerful being among them would disrupt the balance of power.
In the fanfic, Naruto might be in the hospital because of some strange illness that no one has seen before. The doctors in the hospital are trying all kinds of methods to cure him, and he might be feeling really frustrated lying in the bed all day. He could be thinking about all the things he wants to do once he gets better, like going on new missions or training harder.
One reason is the difference in interpretation. Some fans have a very set idea of what Naruto should be, and when a fanfic goes against that, they bash it.
Well, in a fanfic where adult Naruto meets kid Naruto, it could be really interesting. Adult Naruto might be super proud of his younger self. He could give kid Naruto some tips on how to train better and how to deal with the loneliness he sometimes feels. Maybe he'd also tell him some spoilers about future events in a fun, teasing way.
Perhaps in this fanfic, Naruto would be confused by the concept of the Avatar at first. But as he gets to know more about it, he realizes the similarities between his world and the Avatar world in terms of protecting people. He might also have some interesting interactions with the different tribes in the Avatar world, like the Fire Nation. And who knows, he could even find a way to use chakra to enhance bending abilities.