"The Cereal Aisle" Optical Illusion Print

This poster seemingly shows the cereal aisle of a store, however, with the use of the included red decoder, another layer of the image is revealed... What lurks in these cereal boxes? 
 
  Measuring 8"x8", this high-quality giclée print was printed on textured Hahnemüle 100% cotton paper (310 gsm) with archival ink