Science simulation with scratch

I'm looking for a science simulation scratch game in any of these areas: 1. human body (like heart) 2: Weather/climate affects on earth. Basically it can be any science topic that elemantry students learn. The essence is that it has to be 1. Simulation 2. scratch based. 3. science based. By simulation I mean a way to descirbe a real phenomanen using some handles for the palyer. Example: [login to view URL] . It shouldn't be too sophisticated. It should be for a 4th grader to be able to understand and use in order to learn any a science phenomanen.