An ! Switch from Paper Mario.
! Switches are objects found in the first three Paper Mario Games. They are usually seen as blue rounded or square buttons with a bouncing exclamation point in a clear center and a gold bottom. They are usually activated by either jumping on them, charging a partner into them, or ground pounding. Once activated, a new room of a level is usually opened up. In Paper Mario, ! Switches appear several times during the Prologue and Chapter 1, as well as a large one in found in Chapter 3. In Paper Mario: The Thousand-Year Door, several switches are now red, but all of them serve the same purpose as the previous game (Red ones deactivate after a certain amount of time). In Super Paper Mario, ! Blocks appear more often, and can now be found by using Tippi. A large Red Button also appears in the Yold Ruins, and it summons a bunch of Spiky Tromps.
A Red ! Switch from Paper Mario: The Thousand-Year Door.
A Blue ! Switch from Super Paper Mario.