The hands-on approach to science is important. However, as stated in the video students cannot make a full and complete determination of their results due to the limitations of small scale experiments. So, computational science is different that mass amounts of data can be analyzed in a shorter amount of time.
I would use the CS model to show the progression of contaminates in the underground well-water system. Our community in the mid 70's was an official Superfund Site because several companies had dumped toxic wastes into clay pits in the Jurupa Hills. Showing the progression of the contaminated plumes towards the community using the CS models would be advantageous to showing the rate of speed and volume.