Aimed at pre-schoolers, this series follows the adventures of Bob and his machines: Scoop the leader/digger, Muck the digger/dumper, Dizzy the cement mixer, Lofty the crane and Roley the steamroller. Bob's business partner Wendy and Pilchard the cat all help out in the builder's yard. Other characters include Farmer Pickles, his tractor Travis and the naughty scarecrow Spud -- who is always up to mischief.