Secret Message Valentine Craft for Kids

This secret message valentine craft is a fun craft for Valentine’s Day. Kids will love watching their hidden messages appear as they paint with watercolors. Simple and perfect for classrooms, playdates, or at-home fun!

finished heart that says I Love You on it with the water paint in cup above it

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This craft makes for an adorable secret message valentine. My 4 year old had so much fun writing me his hidden messages and was so excited when I uncovered them. (His message was something along the lines of “I love you mom, I think you are pretty great” however the spelling was in his own 4 year old code that I struggled with cracking :)). 

My kids think that the white crayon is like invisible ink which is apparently super cool :). If you have older kids you could have them create their own special code with a decoding sheet to add an extra layer of fun to this activity!

This would be a fun idea for a DIY valentines card to give to your child or for them to make for their classmates or loved ones. I love homemade Valentine’s Day cards. This activity puts a special twist on the term “secret valentine”.

materials on table (paint brush, water color in cup, white crayon and watercolor paper with cut out heart shape

Materials Needed

How To Make Your Secret Message Valentine

Take a piece of water color paper and cut it out into a heart shape

With your white crayon write a message on your water color paper

child writing message on heart

Take your water colors (remember this can be watered down in a 1:1 ratio of water color to water) and use a paintbrush to paint it onto the heart

Uncode your special note 

child painting heart to uncover secret message that says I think you are awesome

Fun Variations & Ideas

  • Classroom Activity: Have students write kind messages for each other before painting.
  • Gift Idea: Attach to a small Valentine’s treat or use as a card!
  • Science Twist: Talk about how wax resists water, making this a fun STEM lesson too!

Other Fun Valentine’s Day Crafts

Coffee Filter Hearts

Popsicle Stick Heart Flowers

Fingerprint Heart Tracing Activity

Pin For Later!

pinterest pin for the secret message valentine craft for kids

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