I want the sand timer to start off with the sand in the top of the timer, and then for all of it to fall down to the bottom and then stop there & I don't need it to turn round or anything.If you want to do it with particles, be aware that this would be a VERY computationally expensive simulation. What kinds of things do you want to do with it? Do you want the sand to be dynamic/animated? Do you want to just fill the timer? Do you want to simply make a still?