Junior Scientist Sand Clock (Study Project)
An hour glass, also known as a sand glass or a sand clock, keeps time. When the hour glass was invented in the third century in Alexandria, it was sometimes worn like a watch on a chain. The specific length of time each hour glass measures is reckoned by how long it takes the sand inside to run from one bulb to the other. In this activity, your child will make her own sand clock and learn to measure the time it keeps.
Age Group : 8 Years to 11 Years
Battery Included : NO
Ideal For : School Children from Standard IV to IX
|Delivery Period||6 to 7 Working Days|