9-12 Second Hourglass Timer

This is an hourglass sand timer printed with natural translucent PLA for the "glass" which completely encloses the sand.
http://www.youtube.com/watch?v=KmxJaU5Fkpk&feature=youtu.be

There are two versions of the glass; one with a narrower neck and the other wider. I used sand from a craft store, which isn't very fine, so I used the wider hourglass for the version you see in the video.
If you can find really fine sand, then try the narrow version.

Your time will vary depending on the size you print and the type of sand you use.

It turns out that in one direction the time is consistently 9 seconds and the other it is 12. It must be due to the texture of the print.