I think all beginners buy some stuff that they never use later or even curse how in the world they could ever buy such §(")=.
But now my question is: Do you have any tools, that you actually used or still use... which you would not want to use in a group working or otherwise "in public"?
This coming from a guy who scryed with Magic: The Gathering cards (yeah, tarot bores me

my current top 1 is
The Harry Potter Replica Wand *yikes*
Yes, I have one and I actually use it as a ... wand. I do not even like HP, nor read those book or watch those movies (exception could be when nothing better is on TV...and given German TV this is hardly anything difficult; but then those kids annoy me after 5 minutes).
Case is it was not so expensive and I like the look of it (besides me being unable to make a cool looking wand myself

But I would not want to use it "in public"... the thought of me waving around with it outside my personal 4 walls is just eeeeeeeeek.
Now that I outed myself: What is/are your "tool(s) of embarrassment"?