This was very nice intro to working with Interactive Grid page types. I've been developing Apex applications for over a decade but just moved to an Apex version that supports Interactive Grids, so this was a great way to feel it out with sample data. As always, I would have like a LITTLE more explanation about WHY we would do a step, maybe at the end? That just puts things in context for me, helping the concepts stick better and accelerating my future learning.