Now through September 17th, head on over to here where you can enter to win one of 15,000 special boxes of Rainbow & Unicorn Lucky Charms Marshmallows in the Lucky Charms Marshmallow Only Instant Win Game!
There is no purchase necessary as you can easily get FREE entry codes via email.
Just scroll to the bottom of this page, choose “Where can I find a code?” and then at the bottom of the pop-up choose “Click here to find out how to request a free code” and fill out the form. You will then receive your code within minutes of submission via the email address you provide.
You can request multiple codes and enter up to 30 times daily to increase your chances of winning one of the 15,000 prizes.