The Johnstons are an average American family of seven pursuing the American dream. Dad Trent and mom Amber have five children under the age of 16, all with achondroplasia dwarfism.The Johnstons are an average American family of seven pursuing the American dream. Dad Trent and mom Amber have five children under the age of 16, all with achondroplasia dwarfism.The Johnstons are an average American family of seven pursuing the American dream. Dad Trent and mom Amber have five children under the age of 16, all with achondroplasia dwarfism.