![]() ![]() Once it is written, it takes a bit of time to dry out, especially if it is written thick. A smaller tip works best so you can write the letters smaller. We used a very fine paint brush to write the message. All you need is laundry soap and a small paint brush or q-tip. This glowing invisible ink is the best one we have tried. My daughter wanted to do a series of clues with ours to lead her brother on a hunt around out yard.ĭid you know that laundry detergent glows? Cool, right? We have tried a few different invisible ink experiments to decide which is our favorite. I know it isn’t exactly a map, but you could easily take this activity and make a treasure hunt map or some other hidden secret map with it. This glowing invisible ink secret message is my version of a marauder’s map. Plus, I will be linking to some other awesome Harry Potter STEM activities from the other participants. This week along with my glowing invisible ink secret messages, I have Dry Ice Crystal balls and Arithmancy Math activities for you. You guys are going to love these fun Harry Potter teaching ideas. This week I am joining forces with some of my favorite bloggers to bring you a week of Harry Potter STEM activities. Want to learn how to make glowing invisible ink secret messages? I am excited to show you how today! This is such a fun Harry Potter science themed activity to do with kids.
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