All original Shashibo Magnetic Puzzle Cubes are made of recyclable ABS injection mold plastic, tear-resistant stickers, and have 36 internal rare earth magnets enclosed within each cube! Both the ABS plastic and rare earth magnets are recyclable ♻️ at the end of their life! Combine 2 or more Shashibo to build larger shapes and create more possibilities. Can you master the shape shifting box?