Children who attend the Pepperbox Nursery, in Clink Road, Frome, welcomed some special visitors.
Jim and Emma Norris, of Sandy's Hill Farm, took one of their tractors and three calves to meet the youngsters.
Their son Harvey attends the nursery and he was able to help his friends in telling them how to feed the calves and helping them to have a good look around the tractor.
Jim and Emma have nearly 200 Holstein cows and another 140 heifers, on their dairy farm at Lower Keyford.
A spokesman for the nursery said: "The nursery children were very good with the animals and the calves behaved themselves too.
"When Harvey was asked who was coming to visit that morning, rather than the expected reply, Harvey said that 'farmer Jim was coming'."