Simple Power
Simple Powers, also known as Power 1, are collectible items in the original Rayman game, Rayman Junior and Rayman Designer, looking like small red balls with the letter P, around which gravitates a health point. They restore Rayman's health by one point.
A Simple Power gives you one extra energy point.—Manual, Rayman
There are similar pickups called Double Powers, which restore Rayman's health by two points, and another type called a Big Power, which restores his health completely.