Being Constructive

My neighbor (mother of M in green ) walked over and asked if this gave me anxiety. I said, "If one of them were mine it might!". His dad said they needed something constructive to do. The one on top seemed very adept at working the battery operated drill. He told me he is the builder, the others bring him stuff. They are using the swimming pool ladder and then have nailed five boards into the tree for steps. Summer fun!