WHAT I DO BEST When Diggs starts treating everyday jobs on the construction site as a competition, Bozer decides to introduce a real contest -- the Machine Challenge! When Diggs loses the lifting challenge and the roll and dump, he starts to think that maybe he is no good at anything - until the speed loading that is ! Winning that teaches the little digger that everyone is good at something. CARNIVAL CAPERS It's Maxine's "mileage day". Bozer enlists the help of the other machines to organise a Carnival Party to celebrate but it has to be a surprise because Maxine doesn't usually celebrate her Mileage Day and she doesn't like being made a fuss of. While Bozer, Lug and Carl transform themselves into the best looking Carnival floats around, Diggs, Carrie and Scooch set about organising the music and the venue. Will Maxine find out before she's supposed to and when she does, will she be pleased or peeved?!!