Where's your magic slate?

I am sometimes impressed by my own ingenuity. I think this is something you are blessed with the first time you give birth.

I was driving in the car and needed some phone numbers that were surprisingly not entered in my phone, so I called a friend and as she told them back I realized I didn't have a pen/crayon/lipstick I didn't care about to write with.

In a boldly brilliant move, I reached behind my seat for a long abandoned "Magic Drawing Slate" and scribbled with my fingernail.

I don't think I could part with it now.