With 100th day approaching (and getting there was no easy feat with all the snow days we have had) I decided to have a little lesson in measuring volume. It was super easy and super quick. BONUS: Any lesson that ends with a snack gets rave reviews!My boys (kindergarten and 1st grade) counted out 2 groups of 100 popcorn kernels. We popped one group of 100 kernels and compared the volume to the second group of 100 kernels. The difference in volume was easy to see and the snack was yummy!