Christmas gift swap ruby program

A guy I work with named Brad has told me several stories about how he's gotten his kids (I think in particular one daughter) to geek out with him a little by sitting down and writing some code with him. Simple stuff like penny flippers, dice rollers, math homework, etc. This motivated me to sit down with my 13 year old sister and write a short little ruby script with her in order to generate the Christmas gift swap list. Our family will be able to use this next year instead of having to manually draw names out of a hat.

require 'pp'

def print_swap_list(names_hat)
  #puts "The names (out of order):"
  #pp names_hat

  buyers = Array.new + names_hat.sort!
  buyers_copy = Array.new + buyers
  #puts "The names (ordered alphabetically):"
  #pp buyers

  #buyers.each_with_index do |buyer, number|
  #  puts "#{number} - #{buyer}"
  #end

  receivers = Array.new

  while(buyers_copy.size != 0)
    random_name = buyers_copy[rand(buyers_copy.size)]
    if (buyers_copy[receivers.size] != random_name) then
      receivers << random_name
      buyers_copy.delete_if { |the_buyer_in_the_buyers_copy_list| the_buyer_in_the_buyers_copy_list == random_name }
    end  
  end

  0.upto(names_hat.size - 1) do |number|
    puts "#{number + 1} - #{buyers[number]} | #{number + 1} - #{receivers[number]}"
  end
end

puts "================================================="
puts "Creating the gift swap list."
puts "================================================="
# PUT THE NAMES OF THE PEOPLE THAT SHOULD GO INTO THE HAT HERE!
names_hat = %w'Name1 Name2 Name3 Name4 Name5 Name6 etc'
print_swap_list(names_hat)
puts "================================================="