Pretty objects: this activates the neurons.
The reason this MBP was running 10.7 is because my elderly relative found it jarring with the new iconography and context menus (hamburger icon, share icon etc). This MBP was hard reset to its initial OS. For many people, including my relative, the glass effects and flatter icons were simply too high of cognitive confusion to get mundane stuff working.
Well that was the original claim in the thread.
> by observing what parents do
My daughter seems to pick things up by experimentation rather than by observation, and material design works for this.