I like to use this a PLENARY after pupils have done their own dice rolling and plotted bar charts. The computer can roll one, two or three dice 50, 200, or up to 1000000 times. Pupils see the shape of the graph approaching the theoretical distribution as the number of rolls is increased. It draws an instant bar chart. If pupils have rolled two dice it is a good challenge to see if they can predict the graph for three dice i.e. symmetrical about 10 and 11, I would welcome feedback on this resource.