Time to learn time
Time to tell time
with colourful sands inside
with adjustable timing
from 1sec to 3 minutes
we are proud to contribute our this product
sand timers |
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| Specifications︰ | In Chinese acient time, people used two methods to calculate the time,
One is sand timer, another is clepsydra.
This is our great nations inventions
Now in modern ages, people is more clever, they used our sand timers to help calculate the duration of brushing their teeth, it is said that, dentist's advice is that the best period of brushing your teeth is 3 minutes. |
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