High Quality- Safe and non-toxic ink, no glare, bright, not easy to fade. Eco-friendly wooden, strong and free of puzzle dust. Precision cuts ensure tight interlocking. 100% Satisfaction - Don't worry about missing pieces. If there is a problem with the puzzle, please feel free to contact us and we will send you a replacement. Challenges and Achievements - Develop hand-eye coordination, fine motor skills, problem solving, shape recognition, memory and task completion. Puzzles can effectively enlighten people's mind and train their thinking, judgment and patience. Every time you complete a puzzle, you will feel happy and satisfied. Best Christmas Gift Choice - Puzzles can soothe the mind and improve logical ability. Completing puzzles with family or friends strengthens the "bond" with each other, which is one of the most valuable features of puzzles. A good choice for birthday and Christmas gifts.