Hourglass Timer Set: The package includes 4 hourglass timers. 5mins, 10mins, 15mins, 30mins timer in one set. Both sides have different colors and clear numbers, easy to distinguish. The best time management tool: It can help your child improve work efficiency and improve time awareness. The clock can be used for cooking, games, classrooms, parenting and training. It can also be used as a decorative and timing tool for the home or office. Color Variation: It is easy to distinguish colored hourglasses in purple, green, blue and pink. Shockproof Hourglass: Our hourglass is made of sturdy plastic cover, borosilicate glass, sea sand and a protective cover, which means the hourglass will not be easily damaged and has a longer service life. The hourglass is a very effective visual cue that can improve alertness and time management. Widely Used: The hourglass timer is suitable for cooking, games, classrooms, parenting and training. Can also be used as a decorative and timing tool for home or office.