Color Changing Heart Bookmarks for Valentine’s Day

Add a little science to your valentines this year with our Color Changing Heart Bookmarks. Use heat sensitive paper to make an extra special bookmark for Valentine’s Day. I get commissions for purchases made through the affiliate links in this post.

Color Changing Heart Bookmarks

Steve Spangler Science sent us the heat sensitive paper we used in this project. You can purchase a package of the heat sensitive paper here.

The color of the paper is magenta when it’s at room temperature or cooler. Warm up the paper (with the heat of your hand) and the color washes away. The paper turns white. The magenta color returns as soon as the paper cools back down.

Supplies Needed

In addition to the heat sensitive paper, you’ll need the following supplies to make your color changing heart bookmarks:

• Cardstock (we chose yellow)
• Heart punch
• Hole punch
• Paper cutter and/or scissors
• Glue
• Yarn
• Stamp and stamp pad (we used this Rain Forest set from Melissa and Doug)

Aiden wanted yellow bookmarks so we could add a lizard stamp. The lizard is two colors to represent a color changing chameleon. I used a paper cutter to cut yellow cardstock into the size we wanted. We got 8 bookmarks per page.

We used a heart punch to cut out hearts from the heat sensitive paper and attached them to the yellow cardstock with a glue stick. We used a hole punch and yarn to tie on a bit of fringe.

Touch the heart and warm it up to see the color change.

Pass the color changing heart bookmarks out for valentines at school. You can write the To/From on the back of the bookmark. I plan on adding a circle tag (made with a circle punch) to the fringe on the bookmark. Then, Aiden can write the To/From on the circle.

More Valentine’s Day Card Ideas for Kids

• Solar System Valentines – Download this valentine for your space lover. They are the perfect size to print out and send to school for Valentine’s Day.
• Angry Bird Valentines with Secret Messages – Use crayons to reveal Red’s message to Chuck.
• Secret Code Valentine’s Cards – Combine science and art to create these pretty cards. Then, add a secret code message inside.
• Robots and Glitter Valentine’s Day Card – Use stickers, cookie cutters, and glitter to make these easy cards. Perfect for preschoolers.
• Hide and Seek Valentine’s Day Card – Inspired by Happy Valentine’s Day, Mouse! by Laura Numeroff, this card combines drip painting and hide and seek pouches.

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