Thumb tip for mind reading illusion

Thumb tip printed in PLA Has a small hole to add a piece of pencil lead intopretend to write a number on a piece of paper and hand the pencil to the spectatorhold the piece of paper with the thumb over it and ask them for the number stall for a moment with words as you write the number with hidden lead in the thumbshow them the paper….Magic! Also can be used as a normal thumb tip for vanishes if you remove hole for the lead