No need to define how it will interact. Just with what.

Keep in mind it uses the space of Potential Energy so the more you pre-determine its interactions the more you may be sub-consciously limiting your results.

So, Interaction: with classroom, car ride, backpack, everywhere in be'twixt.

Keep in mind that this element is the most important, because the Symbol develops a relationship with your perspective here.

It doesn't matter if the symbol is thrown away by an instructor because it still counts as an interaction. (Interactions are neutral.)

hope this helps!