A few common problems can arise when using the simulators: You are trying to use the simulators on mobile. Sorry! Our simulators are not yet optimized for mobile device use - you need to be on a computer browser to use them. We are working on adding mobile-capabilities. You have a pop-up blocker or similar enabled. For certain drag and drop actions, a pop-up blocker seems to cause issues. Try to disable it for the simulator. It's unclear what the next step is... Please let us know via email where you are getting stuck. Or you can have a look at our simulator videos. It's like a cheat sheet for the actions! What is DNA simulator video walkthrough: https://youtu.be/BstmZR0PehICanvas kit for living paintings & bioart simulator video walkthrough: https://youtu.be/E8rTS18sHMAEngineer-it kit for genetic engineering simulator video walkthrough                                               version 2.0 https://youtu.be/EYGDaTS-ewI   version 1.0 https://youtu.be/ZQmTcejhgug