Speaking of others having ideas first, I once got obsessed with an insight about mazes: The reason most are so boring is that you can see the start and end at the same time. What if … you had to flip the maze? Or if it was on the six sides of a cube? I built such a cube maze. Each face was a grid 12 spaces across and 12 up and down. Painted it red. A few weeks later, in a toy store, saw a dead ringer for my prototype. Red. 12-by-12. About the same size. Mine had one extra feature this one didn’t. Sure made me shake my head.