Sounds like he admits to playing hide and seek with them, which is highly suspicious to start with. Then if he was groping with his eyes closed for them, as he seems to say, that only heightens the suspicion.
I don’t think there are any children in this age range in the US who haven’t been taught how inappropriate and wrong such touching is, and so if it really went on that long it is hard to believe they kept quiet for some time just for the donuts.
Yes, I know, but kids of this age also know they can get an adult into big trouble real fast if they want to for some reason.