We had an extra 15 minutes at the end of my 7th grade classes today, and since they enjoyed this so much last time, I decided to give my students another Canstruction problem from Yummymath. Once again, every student went right to work trying to estimate how many cans were used in the figure. What was REALLY awesome is that one group in each of my two classes that worked on this problem actually got the EXACT number of cans listed on the Yummymath solutions page! They, and the entire class, got so excited and were cheering for them! It was really cool!