In general Dart is seen as a single threaded language which makes a lot of things much easier. With modern CPUs with multiple cores it would be really sad if Dart could not leverage the power of parallel processing. Luckily Dart has the abilitiy to execute code in multiple Isolates in parallel. As the approach the Dart engineers took is a bit more cumbersome than the way other systems solve, Isolates are not that popular so far. With this talk I want to change that with an optical atractive application of parallel processthing: The rendering of Mandelbrot Sets.