1. Highquality materials: Our hourglass set features a sturdy plastic housing, sea sand, borosilicate glass, and a protective cover, making it unbreakable and durable. It is shockproof, making it ideal for children. 2. 12Piece Hourglass SetThis set includes 12 hourglasses with six different time durations: 30 seconds, 1 minute, 2 minutes, 3 minutes, 5 minutes, and 10 minutes. Each duration comes in two hourglasses of the same color, totaling six vibrant colors. Clear numbers are marked at the top and bottom for easy identification. Each hourglass measures 8.7 cm (3.43 inches) in height and 2.5 cm (0.98 inches) in width. 3. Easy to distinguish: The six hourglasses come in different colors—red, green, yellow, pink, blue, and black—and are clearly labeled with numbers at the top for quick recognition. 4. Perfect time management tool: Helps children complete tasks more efficiently and develop a strong sense of time. This hourglass set is great for brushing teeth, cooking, playing, classroom activities, children's education and training, or as a decorative piece for home or office.