Magic cube
Magic octahedron
Magic squares game
Magnetic detent device and puzzle game device
Magnetic square and jig saw puzzle
Manipulable icosahedron toy
Manipulable puzzle cube
Manipulatable game
Manipulatable puzzle toy
Manipulative amusement device
Manipulative amusement device
Manipulative puzzle
Manipulative toy
Marble-sequestering skill game
Mathematical puzzle with prize release means
Matrix puzzle game
Maze
Maze and flexible wand game apparatus
Maze board game
Maze device