Association for the Advancement of Science. It actually provides a plan to build a water clock. If you are in need of a science fair project, or special classroom enrichment activity, then link on above to check this one out.
Your student will first learn what a water clock can and cannot do, then build
his own simple water clock. If he is still interested, he can build a better one. Questions are posted throughout this activity so that students can show their comprehension of the workings of this mechanism. What a cool project to share with other peers!