▽Puzzle Design Competition HOME ●01/05 01:31 Announcing the 2025 CompetitionThe Nob Yoshigahara Puzzle Design Competition was established in 2001 to promote and recognize innovative new designs of mechanical puzzles. The twenty-fifth annual competition begins this year, with judging and awards at IPP42 (Sept 2025). See the full details using the following links.Summary Information
▽Geometric Toy ●06/29 18:20 2009-06-01 2003-10-26 YouTube Channel 2024-06-29