Busy Machines For Busy Kids! Diggers Are Good At Dig, Dig, Digging, " "Scooping Up The Earth And Lifting And Tipping." "They Make Huge Holes With Their Dig, Dig, Digging." "They Can Work All Day. Trucks And Tractors, Fire Engines And Helicopters-They All Like To Work Hard. But After A Long, Happy Day Of Beep-Beeping And Vroom-Vrooming, Even The Busiest Engines Need To Rest. This Bright, Bouncy, Noise-Filled Book Brings Together All The Vehicles That Children Adore.Busy Machines For Busy Kids! Diggers Are Good At Dig, Dig, Digging, " "Scooping Up The Earth And Lifting And Tipping." "They Make Huge Holes With Their Dig, Dig, Digging." "They Can Work All Day. Trucks And Tractors, Fire Engines And Helicopters-They All Like To Work Hard. But After A Long, Happy Day Of Beep-Beeping And Vroom-Vrooming, Even The Busiest Engines Need To Rest. This Bright, Bouncy, Noise-Filled Book Brings Together All The Vehicles That Children Adore.