Really Rolling Hills is the fourth level of World 2 in Super Mario 3D World.
The level revolves around the mechanic of the rolling hills, similar to Yoshi Hill from New Super Mario Bros. U. A new enemy by the name of Skipsqueaks, as well as their other variant, Spiny Skipsqueaks, dominate the hills, jumping on them in a steady fashion.
- Green Star 1: In Cat form, go in the first clear pipe and climb the ledge to get the star.
- Green Star 2: In the underground section, take the wrap pipe to the right of a line of purple bricks to a secret area. Light up each tile to get the star.
- Green Star 3: Right after that wrap pipe, fall in between two of the three wheels to get a star from below.
South of the ledge for the first star, hit a switch while being Mario to get the Small Mario Stamp.