We began the lesson with Richard's suggestion to continue our experimentation on the helium balloon. He wanted to test whether his empty 2-liter seltzer bottle would, if tied to the balloon, sink it. I made a chart on the whiteboard where we could keep track of A. Each object we tested, B.Richard's hypothesis, and C. The result when tested. We tested various objects and Richard had a 75% success-rate. When we ran out of objects to test, we moved on to the study of how to craft a paper plane. First we just freestyled it, each made one, and then went to the playground to the top of the play structure and launched them. Richard noticed his was too heavy and too "flat". So, we discussed how trial-and-error is part of the prototyping process, and we went back to the drawing board. His second attempt was much better, but he still wanted to try for even better. So, we watched some short videos of experts, and we followed along with them. The folds are a bit complicated, but Richard understood mostly how they were folding and re-folding the paper (good spatial relations). His only struggle was the fine motor, but for his age definitely normal to need help with the tricky creasing. We were in the process when class ended, so I saved them and we can finish next time.