Welcome to open house!
Our design- our design was 2 stories of popsicle sticks and clay to hold them together. Then, we would have straws going down the sides to the ground so it is secure. It passed the shake test and we got an A++ on the project in general. We got 133%.
How it solves the problem- our invention is a pipe that goes under your sink. The water that goes down the drain in your sink will go down the pipe into a "bucket" where there will be hydroelectric turbines. Then the water will go through a generator and after that you can use it to power your phone.