Nearly 1 Billion People on this planet do not have access to clean drinking water. Every Day 4,500 children under the age of 5 die from water-related diseases. The world is thirsty because we are hungry.
You can build a water pump that will generate enough force to power a water wheel with pulley that can lift heavy weights.
Explore Design Ideas from Arvind Gupta’s Water Pumps:
Coin Pump – http://www.arvindguptatoys.com/toys/coin%20pump.html
Inertia Pump – http://www.arvindguptatoys.com/toys/inertia.html
Jumbo Pump – http://www.arvindguptatoys.com/toys/can%20pump.html
Pipe and Bottle Cap Pump – http://www.arvindguptatoys.com/toys/pvc.html
Inertia and Vale Pump – http://www.arvindguptatoys.com/toys/pvc%20inertia.html
Simple Pump – http://www.arvindguptatoys.com/toys/coin%20bottle.html
Toothpaste Pump – http://www.arvindguptatoys.com/toys/toothpastepump.html
Pipe Pump – http://www.arvindguptatoys.com/toys/Pipepump.html
Various Waterwheel Designs
http://www.wired.com/geekdad/2008/09/how-to-build-a-2/
Make a Waterwheel with Pulley
http://howto.wired.com/wiki/Build_a_Plastic_Cup_Waterwheel
http://www.sciencebuddies.org/science-fair-projects/project_ideas/Energy_p021.shtml#procedure
http://www.youtube.com/watch?v=x8xow_R0YRI