The Spence family have been farming in Boothby Pagnell in Lincolnshire for three generations.
But 11 years ago, the drop in corn prices meant they had to diversify to survive.
Kathryn Spence and her sister Julie set up a childrens nursery school, with the emphasis on lots of fresh air and outdoor activities, down on the farm.
They started off with just 4 children to look after during school hours and now they have over 300 children on their books.
Their philosophy is that the best teaching takes place outside, where children can learn to think for themselves, take risks, and grow in confidence.
They feed the animals, collect eggs, climb trees and make camp fires.