Keyhole

Here is a challenging maze. At first glance, the two pieces have simple concave and convex angles on their flat surfaces. However, when the two pieces intertwine, they take the shape of a 3D maze. You must twist and turn them around. If you rush without thinking, you will come to a dead end. Be careful as you may end up going around in circles.

Hanayama started in the mid-1930s as a manufacturer and retailer of traditional games, indoor pursuits, and other toys, and from the very beginning has placed a great emphasis on creative ideas and good quality. More than eighty years later, Hanayama continues to make cast puzzles that are guaranteed to be fun and interesting amusements for people of all ages.