Once upon a time, [Mike] bought an hourglass for his sister. He intended to build it into a clock and give it to her ... rotates 180 degrees to restart the flow of sand. Whatever number is at ...

Create Your Own Sand Timer: the DIY sand timer allows you to customize your own hourglass with the colored sand provided, and the 4 tubes of colored sand are in dark blue, light blue, light gray ...

With this 30-minute sand timer and the 5-minute hourglass, you can tackle your work efficiently. Break down your work into easy, efficient intervals.