From the Super Mario Wiki
A Propeller Box is a power-up that first appears in Super Mario 3D Land. It is an orange block with eyes and a yellow propeller that player can wear over their body. The blades of the propeller can be used to rapidly fly into the air to a great height, and then slowly fall back down towards the ground. The Propeller Box is lost once the player is hit by an enemy or finishes a level, but an extra life is rewarded in the latter case. While wearing a Propeller Box, Mario or Luigi cannot throw boomerangs or fireballs, or turn into a statue, but are still able to swing their tails.
Propeller Boxes also appear in the follow-up title Super Mario 3D World, where they act in a way similar to the predecessor, though the box color now changes depending on which character is wearing it. While Mario retains his orange box, Luigi now has a green one, Princess Peach has pink, Toad has blue (which looks really similar to the Propeller Block), and Rosalina has cyan.
Super Mario 3D Land
Super Mario 3D World
Super Smash Bros. for Nintendo 3DS trophy
Names in other languages