Mystery Houses

Mystery Houses are basically the Mystery Boxes from Super Mario 3D Land, but a string of many Mystery Boxes tied to one house.

I think these are pointless, they aren't fun at all and are much too easy anyway.

They're fun.
There one that is really hard.

There much better in 3D World and they get harder near the end of the game.

After playing the main game of 3D World I can say that the Mystery Houses are AWESOME. Much better than the boxes in 3D Land, but you still have those hidden in some of the levels. And even then, the boxes are much better than 3D Land's.

Each house has their own unique idea which is cool.