One doesn’t have to worry about getting the boulder in the box; however, in order to solve, all colored sides within the boulder must match the outer box. Solve edges first and then the centers! Great for the beginner to intermediate puzzle solver. Includes solving tips! Match inside "boulder" color with outer box to solve! Solve edges first and then the centers! Great for begineer to intermediate puzzle-solver! Includes instructions and tips to help solve Ages 6+