THE RESTORATIVE CARD.
Secretly coil up a needle-full of thread by winding it round a ruler and slipping it off; and hide this in a card as you roll it up. Wind around this card a needleful of the same thread, which you then clip to pieces with scissors, shaking the bits into the fire or into your magic box by which they disappear. On unrolling the card, you seem to reproduce the destroyed thread.