SAFETY DOUBLE LAYER: The outer layer is made of durable acrylic material and the inner layer is glass. Double layer protection, strong and durable, will not easily cut children. Non-toxic colored sand, stylish and practical sand timer. 6-PACK HOURGLASS: The package includes 6 pcs hourglasses. 30 seconds, 1 minute, 2 minutes, 3 minutes, 5 minutes, 10 minutes hourglass. 1 time and 1 color, the colored top cap is printed with the time, making it easy to distinguish the purpose of the timer. SANDTIMERS: Sand timer is a time management tool. Helps you and your child get things done more efficiently and improves time perception. These are good for timing children's toothbrushing, studying, classroom use, cooking, exercise, games and so on. Can also be used as a good gift for children and friends for classroom, home and office decoration. PERFECT SIZE: The sandglass timer is small and portable. 8.6 x 2.5 cm. You can travel with some of them. Perfect size for children's small hands, solve children's procrastination. APPLICATION SCOPE: Ideal for classroom, game, home, children's learning, office, self-control, psychological training and cooking. It can be used both for relaxation and for effective use of time. Note: This sand timer is not an accurate timekeeping device, so there are time deviations.