I learned about the WaterPumpingBaseModel on a wonderful website called Teachers with Guts. The idea comes from the lesson plan Water As a Shared Resource. The activities were wonderful, but my students struggled with bugs in the model. StarLogoNova is great, but it is much more glitchy than scratch. This is my attempt to see if I can make a base model in scratch that will do the same thing as the StarLogoNova computer model. I would like to thank Joshua Danza's great youtube tutorial for helping me think about translating this model to scratch. https://www.youtube.com/watch?v=5DreEBmFGzI