Suna's reaction would depend on many factors. If Naruto arrives during a time of relative peace between the two villages, they may be more lenient. But if there are existing tensions, it could be a different story. Some Suna ninja might recognize Naruto's potential and try to recruit him for Suna, while others would be worried about the political implications of sheltering a Konoha ninja.
The village would likely be in chaos. Naruto, despite being an outcast in some ways, was still an important part of Konoha. The Hokage and the ninja leaders would probably send out search parties immediately to find him.
An excited kid listening to a story may react in various ways. For one, they might make excited noises like 'ooh' and 'aah' at interesting parts. They could also repeat some of the words or phrases from the story in an enthusiastic way. Sometimes, they might even act out some of the scenes they hear in the story, like if it's about a superhero, they might pretend to fly around the room. Their reactions are a sign of their enjoyment and active participation in the story - listening is not a passive activity for them.
Perhaps the kid is from a foreign land that Naruto visited during one of his missions. The kid could be an outcast in his own place because of some unique trait. Naruto, being the kind - hearted person he is, decides to adopt him. It could be that the kid has a different kind of chakra or a strange mark on his body that makes others afraid of him, but Naruto doesn't care.
Scott would probably be very protective. He'd feel responsible for taking care of Stiles and making sure he doesn't get into too much trouble. Lydia might be initially shocked but then use her intelligence to try and figure out how to reverse the situation. And Derek, well, he'd probably be a bit annoyed at first but would also end up being one of Stiles' protectors.
Akane would probably be shocked at first. She might have some mixed feelings since she had her own relationship with Ranma in the past. But ultimately, she would likely be supportive and help out when she could. Ukyo, on the other hand, might be a bit jealous at first, but seeing how happy Ranma is with his new family, she would come around and be friendly towards the kid.
There are different ways she could react. If she's a bit shy, she might blush a little and then gently ruffle the kid's hair. On the other hand, if she's very outgoing, she might even pick the kid up and give them a little twirl while laughing and saying how much she loves them too. It all depends on her personality, but in general, she would respond in a warm and friendly way to the kid's innocent gesture.
Dean would probably be very protective. He's always been the big brother looking out for Sam, and with Sam as a kid, that instinct would be even stronger. He'd be constantly worried about Sam getting hurt and would keep him close at all times.
Their friends would likely be very excited. Soul might be a bit surprised at first but then would be super supportive. He could offer to babysit sometimes so Kid and Maka could have some time alone. Black Star would probably be really loud and enthusiastic, constantly bragging about how his friends have a cool baby. Tsubaki would be more calm and helpful, bringing over home - cooked meals for the new family.