How to use the force of water to lift an object?

The school’s cycle 3 classes are invited to present a technology project: to design and build a machine that can lift an object without using human power. You and your friends decide to take up the challenge. You remember that one summer you used to have fun turning your pinwheel by spraying a stream of water on it from the garden hose. So you suggest to your team to build a machine that uses water power to raise an object. - Activity developed by Éclairs de sciences.