Wee Gillis by Munro Leaf is a Caldecott Honor book that tells the story of a young Scottish boy who must decide whether to be a Highlander who stalks stags or a Lowlander who raises long-haired cows. Wee Gillis spends a year in the Lowlands learning how to call the cows, and his lungs get very strong.
 
Then, he spends a year in the Highlands learning how to hold his breath so as not to frighten the stags. This makes his lungs even stronger! When the time comes for Wee Gillis to choose whether to be a Highlander or a Lowlander he chooses to be a bagpiper instead and uses his powerful lungs to make music with the biggest bagpipes in Scotland.