Cheryl makes a good point about buddies. These are a BIG DEAL in our school, they play a major role in the life of a p1.
The P1s go to the dinner hall 10 mins before everyone else and their P7 buddies go with them. They help them buy lunch or check that they eat their sandwiches before they go out to play. Then they play with them during lunchtime, to check that no one is left out, report on any issues, take the scraped knees and bumped heads to the medical room etc .
This goes on until about Christmas, until they can do lunchtime on their own. They always go 10 mins early to avoid the rush ( it’s a small dinner hall) .
Most of the P7s give their buddies cards and gifts at Christmas ( small things , like stationery or sweets ). The school don’t suggest this of course, it’s just A Thing most of them do. They help them with their roles in the nativity.
They have races and get photos together at sports day, do a special song at the leavers service etc . My Secondary aged children went back to school to see their former buddies, because they ❤️ Them so much.
Of course it depends to some extent on the personality of the two children, but 2 of my 3 children had great buddies and also got on very well with their own buddy. It Was a big part of their time in p1 and P7.