❤ Features: Cultivate children's sense of time, 30 minutes of play time, 60 minutes to complete homework, a very meaningful gift. ❤Function: The hourglass can be used to limit the time spent watching TV and tablet computers, and cultivate children's sense of time, because the hourglass will extend the time. ❤Function: This is a super efficient productivity tool. In some cases, it is more efficient and more natural than smartphones. ❤Advantages: Using a timer hourglass in life can change the habit of procrastination and improve work efficiency (compared to the ear-piercing bell of the electronic timer's arrival time, it disrupts ongoing thinking and helps to concentrate on work) ❤After-sales guarantee-before each hourglass is delivered to the customer, our factory has undergone more than 1,000 inspections. The hourglass timer reaches the highest quality standard of ±10 seconds. If you have any questions about the hourglass, please contact us and we will solve the problem for you at any time.