Ruby: calling included classes within parent module

search.rb

module Search
  @children = []

  def self.included(base)
    @children << base
  end

  def self.query(val)
      @children.each do |child|
        child.query(val)
      end
  end
end

class A
  include Search

  def self.query(val)
    p "Calling query A - with #{val}"
  end
end

class B
  include Search

  def self.query(val)
    p "Caling query B - with #{val}"
  end
end