When you show this technique to children, they see it as magic! Place the hose in the target liquid so that the hose fills. Then plug the end through which you want liquid to run and pull that end out and place it lower than the liquid to be siphoned. Release the plug and watch the eyes light up on the children ... works every time!
Where do you find children who are so easy to amuse?
When my granddaughter was 3, I took her outside and put potato chip crumbs on the walk.
100's of ants paraded down the walk. You'll never find chips in her bookbag.