Pack of 6 Hourglasses: This hourglass set contains 6 hourglasses in different colors, including a 1 minute hourglass and a 3 hour hourglass.Minimum Hourglass, 5 Minute Hourglass, 10 Minute Hourglass, 15 Minute Hourglass and 30 Minute Hourglass.It is perfect for reading, cooking and baking, brushing teeth, playing games and practicing timekeeping. Shockproof Hourglass: Our timer is made of durable PVC, borosilicate glass, sea sand and a protective cover, which makes the timer less likely to break and last longer.The hourglass is a very effective visual cue that improves concentration and time management. The best time management tool: It helps your child do things more efficiently and develop a strong sense of time.This timer can be used in cooking, gaming, classroom, children's education and training.Can also be used as home or office decoration and timekeeping tool.Great gift for children and friends. ADVANCED TECHNOLOGY: This hourglass features matching black molded end caps and clear thick walls.Each timer features colored sand and a clear digital display for easy identification. Note: 1. Due to differences between different monitors, the picture may not reflect the actual color of the item.2. Due to manual measurement, there may be 1-2mm error.