This is Pyraminx, a tetrahedron-shaped twisty puzzle often marketed as a "Pyramid Magic Cube". 

Structure: It consists of a tetrahedron divided into smaller tetrahedra and octahedra, which rotate around the axes. 

Difficulty: It is generally considered easier to solve than the traditional 3x3 Rubik's Cube. 

Mechanism: It features a 2-layered mechanism, making it a compact pocket puzzle. 

Goal: The objective is to scramble the colors and then return them to their original position, with one solid color per face