It is completely interchangeable with a normal Sharpie style pen

be combined with each other

he offers us something incredible today

- Henry Harrius

high-impact effects

Self Working Number Magic | Karl Fulves Liwag It is completely interchangeable with101 Foolproof Tricks Numbers pervade nearly every aspect of our daily lives: telephone numbers, zip codes, Social Security numbers, driver's license and credit card numbers. We are leagued by numbers. No wonder we're fascinated, intrigued, even a bit bewildered by them; no wonder tricks involving numbers are perennial favorites. With Self Working Number Magic, you can perform show stopping tricks, stunts and routines that are sure to delight audiences