Change-Ink by Larry White and Steve Dusheck

Change-Ink by Larry White and Steve Dusheck

Regular price $24.99
A black ball point pen and a red ball point pen are clearly shown.  The pen bodies are transparent so the ink color can be clearly seen.  The caps from each pen are exchanged and suddenly the pens write in the opposite colors!  Easy to do.  Ink tubes can be replaced with the tubes from any red and black pens (if the ink ever runs out).