This POW Block can release a mushroom or a coin with compressed air. Hit it and you will receive your item!
It comes in 2 versions:
PRO Version: [link]
This blue block releases a mushroom. It has very complicated folds, I recommend it only for advanced papercrafters.
NOOB Version: [link]
This red block releases a coin. It is very easy to build, you can see the modeling process in this video: