The PPS curriculum has this AWESOME track where the kids study all the city monuments and bridges and then get to make one for a homework project. As you can imagine, Mark ALSO got very very excited about this. Henry and Mark worked so well together and they did a great job. I dropped the kids off at school the morning they were due and it is incredible the creativity that exists at the school. All sorts of mediums were used to great the bridges. SO COOL.