On the last day there is always a bit of a tizzy and a panic. Finishing details, things still aren't working, and the parents are coming. It's a little daunting, and a lot motivating.
We played with at least 3 iterations of erupting volcano. Moved entire laval flows. Finished boulders. Finished up every obstacle, created 3 totally new ones, and collectively decided the order of the run.
We finished boulders
We tried to get more power out of our fan to make the volcano erupt
Getting the lava in place
Then we played in our creations, and it was fun.