An stupendously fun introduction to global sensitivity and uncertainty analysis of environmental models. In this 3 hr., hands-on workshop students will be posed a fun question and poll for their initial decisions.  We will then explore through a simple model the uncertainty and risk of the outcome related to this decision, the important factors controlling the outcome, and potential solutions available to us that might reduce this risk and allow us some fun! At the end of the workshop the student will learn about model and their limitations, Monte-Carlo Uncertainty Analysis, Global Sensitivity Analysis, Risk Analysis and Management.