This puzzle was featured at the Duluth Puzzle Derby this year. What is a Puzzle Derby you ask? Puzzlers get together and have a timed competition to see who can complete the puzzle the fastest. There are two different heats in the day and teams of 2, 3, or 4 people. Whether you are working to complete this puzzle in 45 minutes or over the course of a few days, the fun twisty shaped pieces will keep it interesting to the very end. This made in the USA.