title: Simple simulations for Physics in Python?
body: <p>I would like to know similar, concrete simulations, as the simulation about watering a field <a href="https://stackoverflow.com/questions/494184/simulation-problem-with-mouse-in-pygame">here</a>.</p>
  
  <p>What is your favorite library/internet page for such simulations in Python?</p>
  
  <p>I know little Simpy, Numpy and Pygame. I would like to get examples about them.</p>