Polymorphism using inheritance in Ruby

gistfile1.txt

class Animal
  def sleep
    puts "#{self.class} is sleeping."
  end
end

class Frog < Animal
  def make_noise 
    "Ribbet Ribbet"
  end

  def move
    puts "#{self.class} is hopping."
  end
end

class Dog < Animal
  def make_noise
    "Woof Woof"
  end

  def move
    puts "#{self.class} is running."
  end
end

class Fish < Animal
  def make_noise
    "Guppy Gruppy" 
  end

  def move
    puts "#{self.class} is swimming."
  end
end