Click the "Roll" button to roll anywhere between 1 and 100 dice. The number you rolled will be recorded on the graph (hover over the graph to see more details). If you want to speed things up, simulate multiple rolls at once by editing the "Num. Rolls" slider. Click "Reset" or change the "Num. Dice" variable to reset the graph. Try seeing the shape of the graph for "Num. Dice=1", then try it with 2 dice, then 3, and try to make a guess about what happens with 100 dice.
Made for a STEM fair to help students understand the importance of repeating experiments due to the law of averages.