OLK Invisible Pen For Kids Refill  (Pack of 20, Ink Color - Invisible)

The magic invisible ink pens can be used widely. Perfect for the to wedding invitations, for kids spy party, Make a fun party favor, even using the UV light to check dollar bills. Bring you an amazing variety of fun, which is also a really great gift for kids and friends harmless and flavorless ink, you can write everywhere by our invisible pen ultra violate light from back of the pen is used to read the secret massage, also can be used to detect fake currency. pack of 6 spy pen Interesting option for birthday return gifts. The pen will use a variety of colors to keep the activity exciting Non-toxic Harmless Flavorless and non-toxic ink, harmless, It can be wrote on T-Shirts,paper.