DIY rainbow valentine box

This design is for that child who when asked what their favorite color is exclaims, “the rainbow!” (They may or may not be future Hallmarkers.)
One of the best things about this rainbow valentine box is that you can customize the colors however you want. If your kid wants nothing but shades of purple in their rainbow? You can totally make that happen. Get the details, including the free printable, below.
Inspired? Create and share by tagging @HallmarkStores.
What you’ll need:
- Rigid cardboard or paperboard (like cereal boxes)
- Single-face corrugated cardboard or paperboard
- Scratch paper (at least the size of the rainbow you’re making)
- Craft paper or grocery bags (optional)
- Tissue paper, pom-poms or cotton balls for clouds
- Craft knife
- Cutting mat
- Glitter
- White glue
- Pencil
- Glue stick
- Masking tape
- Hot glue gun

How to make your DIY Rainbow Valentine Box
- Get the free download. Download and print the DIY Rainbow Valentine Box template.
- Make the arches. Sketch out the pieces on scratch paper. Then trace onto rigid cardboard and cut out. Approximate size and detail available in the free download. Tape the squares or “feet” of the rainbow to the arches using masking tape.
- Add top and bottom. Cut two strips from the single-face cardboard as wide as the bottom squares. Cut an oval or rectangular mail slot in the strip that will go on top. Attach bottom and top to sides using masking tape.
- Paint or wrap it. To cover up the masking tape, either paint the box white or cover with craft paper (which is what we did).
- Sketch the rainbow. Decide how many colors you want your rainbow to have. Sketch each stripe lightly in pencil to indicate the different colored arches.
- Paint the stripes. Of course you can do a classic rainbow, but feel free to choose your own color palette!
- Add glitter. To add sparkle, make a 50/50 mix of glitter and glue in a small jar or bowl, then swipe it on.
- Make the clouds. Scrunch up little balls of tissue paper, make tissue paper flowers, or glue on pom-poms or cotton balls. Whichever you use, simply hot glue them to each end of the rainbow to create clouds.
Go brighten up the party!
Tip: If you’re using something like a cereal box, cover it with a coat of primer or craft paper before you start painting so the existing print won’t show through your design.

Check out more of our fun DIY valentine box ideas here. Want even more ideas? You know we have ’em:
Shop Valentine's Day
See allYou may also like
See more-
Christmas Dr. Seuss’s The Grinch is skiing in to steal hearts!
Look who's skiing into town in time for the holidays! It's our favorite Christmas curmudgeon, Dr. Seuss's The Grinch....
-
Christmas Light up your tree with your love of Harry Potter
No need for the Lumos charm here—this set of 10 sculpted lights on a string are all you need to illuminate your tree ...
-
Christmas Help us celebrate 75 years with the Peanuts Gang
Fun fact: a 75th anniversary is a diamond anniversary! And we're excited to show Peanuts Snoopy and his pals just how...
-
Christmas From the tree to your tabletop
See how a beloved Keepsake Ornament from retired Hallmark Artist Ken Crow has been turned into a magical tabletop dec...
-
Christmas Complete your Harry Potter and the Chamber of Secrets collection this year!
Relive the mystery and adventure that fills Harry Potter's second year at Hogwarts School of Witchcraft and Wizardry ...
-
Christmas Celebrate the true meaning of Christmas with the Peanuts Gang
Featuring the iconic stage where Charlie Brown and his friends put on their Christmas pageant in "A Charlie Brown Chr...
-
Christmas Buddy and Jovie are here to spread cheer!
This adorable duo feature light and dialogue from favorite scenes from the movie "Elf." Of course, each ornament is a...
-
Christmas Celebrate the season in Dark Side style!
Little tree...BIG impact. Especially with this Mini Star Wars™ Darth Vader™ ShowToppers Musical Tree Topper. Just con...
-
Christmas Come inside, foolish mortal, if you dare!
Relive the fun and memories of a childhood trip to Disney Parks with the Haunted Mansion Keepsake Ornament collection...
-
Christmas Keepsake Ornament Premiere is almost here!
With more than 250 new Keepsake Ornament releases, you won't want to miss the start of Keepsake Ornament Premiere on ...
-
Christmas So many layers to this new collection of Keepsake Ornaments!
Watch as Keepsake Artist Charles Young explains how Hallmark's decades-long artistry in the world of papercraft has i...
-
Christmas The magic of Disney Parks is destined for your tree ✨
That feeling of seeing
-
Christmas Keepsake hot takes: 10 new Keepsake Ornaments that are an automatic add-to-cart
Holiday lovers, we see you! While other people are drenched in summer sweat, we know you’re dreaming of a white Chris...
-
Card Ideas 10 new, trendy cards we’re loving right now
Hot take incoming: Cards are basically mini time capsules. Not only do you get to hold on to a piece of someone’s han...
-
Christmas Visit your favorites at Keepsake Village
Some of your favorite Hallmark friends have gathered for fun and festivities this holiday season! Keepsake Ornament c...
-
Christmas Welcome to Elfville!
We LOVE a new Keepsake Ornament series, and this one promises to be totally adorable. The Welcome to Elfville series ...
-
Calendar Flip Let’s celebrate, y’all! July 2025 Holidays and Celebrations
Get ready for friends, family and fireworks—and break out the red, white and blue for Independence Day. It’s time ...
-
Calendar Flip Welcome Autumn! September 2025 Holidays and Observances
Fall brings cooler nights, cute sweaters, homecoming games and tailgate parties. It’s time to flip the calendar page,...
-
Calendar Flip A (Very) Warm Hello! August 2025 Holidays and Observances
Is it hot enough for you? Well, we’re here to add some extra sizzle. It’s time to flip the calendar page, check ou...
-
Father's Day Give love back: 25+ Father’s Day ideas to celebrate Dad
We love dads. They’re uniquely brilliant, wise beyond reason, silly in the best way and caring in the sweetest. The r...