Hi, I really like to friction pens and was wondering if anyone has some ideas to use them for ? besides a prediction changing to the correct card
for those of you who don't know what a friction pen is, it's is like a normal pen, but the ink is heat reactive, so it disappears when heated up.
for those of you who don't know what a friction pen is, it's is like a normal pen, but the ink is heat reactive, so it disappears when heated up.