he was sitting in the sand with his hands in his lap , and around and around his head they went , tracker arrow and rooty-toot and the meatwagon and the rest , dipping and diving under each other , swooping and doing rolls , coming in for touch-and-go 's on a landing-strip seth has made for them in the sandbox , sometimes doing formation flights down the yard to his swing , going under the seat like stunt pilots in a movie , then banking around and coming back .