when I was 16, I was hired to bag groceries, and they tried to send me to another part of the store for a "left-handed cash register crank"....so I went home on my lunch hour and down to my Dad's shop and cobbled together a silly complicated thing of pipe and fittings & knobs and presented it (in a box)to the guys with apologies for being so long!

I passed whatever test it represented! *grin*