How To: Make invisible ink with milk

Make invisible ink with milk

Learn how to create secret messages using only milk. Use this as inspiration for one of your April Fools Day pranks!

Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.

Buy Now (97% off) >

Other worthwhile deals to check out:

Our Best Phone Hacks

Gadget Hacks' tips — delivered daily.


Wonder if this works with mother's milk?

That was pretty cool but if I have to do it in fornt of the classroom how am I suppose to get heat?????

LOL, I love sex

Share Your Thoughts

  • Hot
  • Latest