Sunday, January 30, 2011

Making Invisible Ink with the Kids

It's a snowy and cold day outside and keeping the kids from going stir-crazy sometimes requires some kitchen science. Today we decided to make invisible ink. I started with a lemon and squeezed for the juice, using a paint brush we wrote some messages on some paper and set them aside to dry. We even wrote one for their father who is at work.

After the juice dried we held the paper up to some light bulbs. The heat changed the dried lemon juice to a brown color and the message appeared. It's amazing how a little science can fascinate and excite the kids. I than asked them what they thought happened to cause the writing to appear. It really is amazing to me how much children really understand the science behind what is happening around them. They just don't understand the full process.

Of course my daughter decided to make invisible bracelets for all her friend.

Other liquids that can be used for invisible ink are apple juice and vinegar

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