it is a clock that uses sand to measure time
The hourglass dolphin is called an hourglass dolphin because its black and white markings resemble an hourglass!
An hourglass was used as a timer, with the size of the hourglass determining the length of time it measured.
How many seconds are in a hourglass
glass+sand=hourglass
glass+sand=hourglass
sand + glass = hourglass
phantom hourglass is released in 2007.
you get the little ball thing tap on the hourglass and draw a hourglass
glass+sand=hourglass
Hourglass triplefin was created in 1876.
Hourglass of Summer was created in 2002.
sand+ glass =one hourglass