kid = {
  firstName:'Mark',
  lastName:'Binder',
  yearOfBirth:2001,
  ageCalculator: function(){
    return 2018-this.yearOfBirth;
  },
  nameCalculator: function(){
    return this.firstName + ' ' + this.lastName;
  }
}
kid.age = kid.ageCalculator();
kid.name = kid.nameCalculator();
console.log('Age: ' + kid.age + '\n' + 'Name: ' + kid.name);