The first challenge was to build a structure that can increase the water pressure of a river stream. We measured the water pressure increase by looking at which LEGO line the water hit.
That's all the instructions we gave our young engineers, and they started designing and building right away!
You can see that as we start, the water only hits the pink line.
We were blown away by how many different ideas our young engineers explored.
Through many iterations and kids learning from each other, our young engineers figured out that the best way to increase water pressure is to focus all the water into one stream.
Then, one of our engineers figured out that by using their finger to plug the hole of their stream, the water collects, even further increasing the water pressure!
The solution we iterated to was not so different from what adult engineers do to artificially create a stream with large amounts of water pressure — a dam!
This high pressure water stream from a dam can be used to power water turbines, which in some parts of the world provide a huge amount of electricity to neighboring cities!
So our next challenge was to build a water turbine that can create the most energy, which we measured by connecting the water turbine to a voltmeter.
