Ummm how fun is this!?
The cereal is inexplicably blue, and features a very angry-looking Dorothy on the front. But those two strange details can be forgiven since each box comes with a collector's toy inside (Pro tip: You can buy a set of all four at Walmart!).
If you're searching Target for a box, make sure to check both the cereal aisle and the toy aisle. Shoppers have spotted them in both locations. Otherwise, there are a few available online through ToyWiz and Mercari.