Watercolors and a white crayon are all you will need to make secret messages and cool art projects! The minimal, common materials make this a great virtual meeting art, science, or spy activity! It could also be incorporated into a larger escape room meeting for older branches.
Children will love this arts and crafts activity. Write an “invisible” message in white crayon, then paint over it to reveal the secret!
— Read on www.education.com/activity/article/magic-art-write-magic-messages/