48 UNIQUE CHALLENGES  Offers a progressive set of puzzles that get tougher as you master the simpler ones.ONE-PLAYER LOGIC GAME All puzzles are solo play, perfect for independent thinking and quiet brain training.AGES 5+ Designed for children aged 5 and up, and also engaging for teens and adults who enjoy a mental workout.COLORFUL FISH PUZZLE THEME Place fish from largest to smallest in a chain, navigating around a lily pad; pleasant visuals make problem solving more fun.DEVELOPS SKILLS THROUGH PLAY  Enhances spatial insight, planning, logic, problem solving, and concentration.TRAVEL FRIENDLY & COMPACT Comes in a sturdy metal case with all pieces and challenge booklet great for holidays, car rides, or quiet moments anywhere.