Open box. Complete. The ThinkFun River Crossing Perilous Plank Puzzle Logic Game is a brain-teasing toy that challenges players to strategize their way to cross a river using a wobble board and a set of plastic pegs. With a recommended age range of 8+, this puzzle game encourages critical thinking and problem-solving skills. The game's theme of strategy adds an extra layer of complexity, making it a fun and engaging activity for puzzle enthusiasts.