Have a great game in Friv4school 2021! Color Hoop Stack is a traditional and highly-addictive puzzle-sorting game. Sort multicolored rings to complete the game. Color Hoop Stack is a difficult, yet peaceful, and completely free brain-teasing sorting puzzle game! We help players relax with new ways of playing and completing various challenges if you have free time. In particular, players also have the opportunity to choose a number of other new games such as Lovely Puzzle.