Toad.js

function Toad(name) {
  Frog.call(this, name)
  
  this.getTeeths = function() {
    return 0
  }
}

const kellyTheToad = new Toad('kelly')

// or using classes

class Toad extends Frog {
  getTeeths() {
    return 0
  }
}

const kellyTheToad = new Toad('kelly')