1. This hourglass set contains 6 pieces of hourglasses in different colors, including a 1-minute hourglass, 3-minute hourglass, 5-minute hourglass, 10-minute hourglass, 15-minute hourglass and 30-minute hourglass. It's great for reading, cooking and baking, brushing teeth, playing games, and training timing. 2. SHOCK RESISTANT HOURGLASSES: Our timer is made of ABS and glass. The hourglass is a very effective visual cue that improves alertness and time management. 3. BEST TOOL FOR TIME MANAGEMENT: It will help your kids make things more efficient and develop a strong sense of time. The timepiece can be used for cooking, playing, classroom, parenting and exercising. Can also be used as a home or office decoration and timing tool. Great gift for kids and friends. 4. Hourglass has matching black molded end caps and clear thick wall. Each timer has colored sand and a clear digital display for easy identification.