Meffert's Hollow Pyraminx - The Original Transparent Tetrahedron Brainteaser Puzzle from Recent Toys - Travel Friendly Fun for Ages 9+ Step into the brainteasing challenge of Meffert's Hollow Pyraminx! This dazzling derivation, conceived by puzzle pioneer Uwe Meffert, gives the classic Pyraminx a translucent twist. Discover its unique inner mechanics as you navigate its nuanced challenges. Can you twist the tetrahedron and create solid colors on each side? Hollow Pyraminx is perfect for both aficionados of the traditional Pyraminx looking for a fresh perspective and newcomers entranced by its transparent charm. Elevate your puzzle-solving escapades with Meffert's Hollow Pyraminx! Merging aesthetic allure with cerebral challenges, this Pyraminx promises not only an engaging experience but also a journey of visual delight.