Pack of 6 Different Sand Timers: 1 minute, 3 minutes, 5 minutes, 10 minutes,15 minutes, 30 minutes, each timer with number printed on the glass of the sand hourglass timer, easy to tell. Shock- Resistance: Made of Durable ABS, high borosilicate glass, sand and protective cover, which allow the glass hourglass timer not easy to be broken, very durable to use. Time Management Tool: The small sand clock can help your kids develop a strong sense of time. Good tool to help your kids doing things more efficiently. Widely Used: Ideal for Games, Classroom use, Cooking, Exercising, kids’ tooth brushing and so on. Also can be used as a decoration. This hourglass set is great gift for children and friends.