7. Create Invisible Ink
You will need half a lemon, water, spoon, bowl, cotton bud, white paper, and a lamp or other light bulb.
Need a cool experiment to do at home with household items? What’s cooler than making invisible ink! Squeeze the lemon juice into a bowl, then add a few drops of water and mix it. Take the cotton bud, dip it in the mixture and then write a message on white paper. When it dries, it becomes completely invisible. To read your message or to show it to your friends, heat it by holding it close to a light bulb or lamp. Pretty cool!
