Say hello to their little friend

Aaron had a classmate's birthday party on Sunday afternoon; Caleb wasn't really left alone as they have a friend, Aidan, who lives a few houses down and is a regular around our house, as they are at his - or up and down the pavement on bicycles, scooters, ripsticks, or foot. The three of them have become good friends although the 'close as brothers' idea also means that they bicker like brothers..."it's mine, give it back", followed by "no it's not"; "yes it is"; "no it's not"; yes it is"; "no it's not"; yes it is"; "no it's not"; yes it is"; "no it's not"; and so on...

Anyway, they have been putting together a treehouse in our front garden with pieces of wood from the garage.  Apparently Aidan is quite handy with a hammer and did a lot of the work himself, bless his 7 years!