Description from the publisher:
Every day, Mailman Marty has loads of packages to deliver. Sometimes he's not very careful and he makes a mistake. Luckily, Marty has helpful children to make sure all the packages arrive at the right address.
In Die Post ist da, the children need to look very closely in order to recognize the colors and objects, matching them correctly. Each turn, a player receives a package card. He has to select a room to deliver the package to (the correct room is the one with the matching colour). After the player has delivered the package, he can verify if he has selected the correct room by flipping the card: on the back is a picture of an object - if that object is also depicted in the room, the package has been correctly delivered.
The game ends in a (shared) victory when all packages have been delivered.