Cast Donuts has beautifully shaped rings that look like 2 donuts intertwined together. Try solving the puzzle by imagining the inner structure and using each of the rings’ division lines as a hint. You will be pleasantly surprised by the unique movements needed to separate the rings. This puzzle is a masterpiece in design and concept. The Hanayama range has been painstakingly designed and developed over more than a quarter of a century!

This uniquely shaped puzzle really does look like a UFO. The spheroidal pieces in the center may slip and slide away when you try to remove them, which makes finding the solution quite tricky. Designed by Vesa Timonen from Finland.