A quarter of this cake has been cut away showing three identical layers inside. This puzzle looks simple but it is very ingenious. Designed by American designer Bram Cohen.

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.