Hey, Peter. I saw it too.
I use this technique when I’m teaching.
It works well to have a few places in each room of your house to ‘hang’ things on. So, for example, the objects can be placed on/in the fireplace, sofa, window, rug, picture frame, door etc. I ‘hang’ stuff in play parks and other places I visit a lot too.
Trouble is – I learned the first 55 elements in the periodic table this way and it took up so much head space that I actually, genuinely forgot to take my kids to school the next day…REPORT ABUSE