My students really liked this activity. One group had 0 typical and 0 mutated after the second generation. They explained to me that they understood the concept of the activity, but they wanted to know if they could roll for second attempt to see if they could at least get to the third generation. :) I also liked how a graph was incorporated in this activity. It helped the students visually see the comparison between the survival and reproduction of the typical and mutated bacteria.