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This is a three-dimensional puzzle made by combining wooden rings. You play by pulling out the red string wrapped around the bottom tier. This two-tiered puzzle is suitable for children aged 4-5 years old. [Question] Remove the red string from the bottom row. Mental preparation 1: Think honestly. 2: Use your head, don't try to pull it out by force. 3: Don't give up, try your best without forcing it. 4: Once you've removed it, it's not over. Now, put the string back in its original place. Spatial awareness, logical thinking, reasoning... It can help develop a variety of abilities that will be useful in your child's growth. Material: Beech Size: Base diameter 120mm, height 120mm ▶︎▶︎Video here → https://youtu.be/zM6VYNTB_lU ←Paste this URL. The puzzle works on the principle of binary numbering: with each additional row, the number of steps required to remove the string doubles. Beginners should choose 2nd or 3rd dan, those with experience should choose 4th or 5th dan, those with even more confidence should choose 6th dan, and those who are still not satisfied should choose the extremely difficult 9th dan. Play with Dad It seems that Dad is better at this puzzle, especially as the puzzle gets more advanced (level 4 and above). Perhaps it's a sign of playfulness, but children's eyes sparkle with the joy of experiencing something out of the ordinary. This is your chance to bring out the "playfulness" that strengthens the energy of life, Dad! Tips for enjoying the Wisdom Ring: Enjoy the time it takes to solve it The point of this activity is to use your right brain while having fun using your three-dimensional sense. You will definitely be able to remove the string. Even if you can't do it right away, please encourage me. It may take days, but it feels great when you finish it.