Popular puzzle is a term used to describe three different types of puzzles: CROSSWORD, JIGSAW, and Rubik's Cube. Crosswords are puzzles consisting of a grid of squares and clues that must be solved by filling in the correct words. JIGSAW puzzles are composed of interlocking pieces that must be arranged to form a picture. Rubik's Cube is a 3-dimensional puzzle consisting of six colored faces that must be twisted and turned until all sides are the same color. All three of these puzzles are popular and have been enjoyed by people of all ages for many years.