Seven years old. Everyone is different too. He doesn't see the need to approach life and strangers ad suspect and dangerous. The kid wanted to help and make friends. Wanted son to go riding etc with him.
In our neighborhood, whnever I was home everybody didn't ask for introductions etc. We simply gt together and went about biking and so forth. Everyone came to our house for koolaid and more than a few ate a snack from time to time. We ran around like wild Indians and our parents though nothing of a bunch of kids in their yards or asking for a drink of water. Of course the men worked and the wives were home taking care of the family and sometimes managing a half dozen thirsty kids, no theirs.
If he was in the way asking him to come back later is appropriate. A seven years old might need a couple of hints.