Playing with sand is something that children love very much. It allows children to get close to and explore nature, and it is important for them to gain scientific knowledge through playing with hourglass. Now let's list the benefits of children playing with hourglass:

Some children like to procrastinate and procrastinate in kindergarten We have used many methods to change them, but the effect is not significant. We often communicate with parents and guide children to complete tasks faster. But it hasn't achieved the desired effect yet. Seeing that the children are about to enter primary school, and the system of primary school is tight and tight, at such a speed, it may be difficult for these children to change after entering primary school. In order to accelerate their changes in the remaining two months,&#

The hourglass in ancient China Due to the fact that solar clocks such as gnomon may lose their effectiveness on cloudy days or at night. Therefore, ancient people invented instruments such as leaking pots and hourglass, oil lamp clocks and candle clocks to record time.

¡¡¡¡The symbolism of hourglass 1. Show the passage of time Hourglass is an ancient way of timing. When you see an hourglass, the first thing that comes to mind is time, cherishing and recording. Early human use of timing relied on the length and direction of the sun's projection to determine time, but it became ineffective on cloudy days or at night. In order to record time more accurately, people invented timing instruments such as leaking pots and hourglass, oil lamp clocks and candle clocks.