Penrose TriangleA 2x2x2 with extensions. Photographed from a certain angle it creates the illusion of the Penrose Triangle.
PentabarrelThree layers in a pentagonal prism with a star-like pattern.
PentalabacusA bigger variant of Astrolabacus with six segments that but with five channels of beads.
Petaminx CubeA mass produced version of the Petaminx without edges and T-pieces.
Philosopher's StoneThe third Multidodecahedron. Without the original webs but in the original doecahedral shape. Went into mass production.
Pineapple CubeA straightforward shape variant of the Discrete Pyraminx which itself is a shape variant of a Cross Cube 2x2x2.
Piranha3D-printed pieces glued onto a 1x3x3 giving it the shape of a Piranha.