Despite the evidence supporting an extension of outdoor learning for children, there are a number of obstacles in the way. One of these obstacles is risk aversion amongst teachers, parents and others, raising reluctance to such diverse and physical tasks. The journalist Tim Gill has written about parental and institutional risk aversion affecting many activities with children in his book "No Fear". Another obstacle is the perceived high cost of facilitating outdoor learning. Creating an outdoor learning environment needn't cost a great deal, however. The UK Early Years Framework Stage, which outlines best practice in Early Years teaching, asserts that: "Outdoor learning is more effective when adults focus on what children need to be able to do rather than what children need to have. An approach that considers experiences rather than equipment places children at the centre of learning and ensures that individual children's learning and developmental needs are taken account of and met effectively"