Hash of wizards

hash_of_wizards.rb

wizards = {
          "Harry" =>{
              :full_name => "Harry James Potter",
              :age => 12,
              :hair_colour => "brown",
              :favourite_class => "Defence Against the Dark Arts"
          },
          "Ron" =>{
              :full_name => "Ronald Bilius Weasley",
              :age => 11,
              :hair_colour => "ginger",
              :favourite_class => nil
          },
          "Hermione" =>{
              :full_name => "Hermione Jean Granger",
              :age => 11,
              :hair_colour => "brown",
              :favourite_class => "Everything"
          }
  }

wizards["Harry"]
# => {:full_name=>"Harry James Potter", :age=>12, :hair_colour=>"brown", :favourite_class=>"Defence Against the Dark Arts"} 
wizards["Harry"][:age]
#=> 12