Roar!! Here’s Liam’s dinosaur birthday party with bright and vibrant DIY paper geometric dinosaur party decor and cake toppers. Liam wanted his pals to come over for a dinosaur-themed birthday party with dinosaur party decorations, dinosaur party games, and a dinosaur cake. With that in mind, I put together fun and spirited paper dinosaur birthday party theme inspired by the trending geometric style and the sticker activity books that he loves so much.

Keep reading for my free printable templates to recreate this dino party for your own little velociraptor.

I worked with ASTROBRIGHTS® Papers to bring it all to life, including a large dinosaur wall decoration, geometric leafy vines, volcano stair risers, happy birthday bunting, party favor tags, and paper dino cake toppers. Thanks so much to Astrobrights for sponsoring my dinosaur birthday party creations for Liam. All designs and opinions are mine.

I like colorful birthday parties so I used a bunch of vibrant Astrobrights colors. Astrobrights is my favorite brightly-colored paper …just look at these inspiring colors! You can use my color suggestions below or choose your own color palette for your own dinosaur birthday party.

For Liam’s dinosaur cake, I made paper dinosaur cake toppers with tiny age 6, dinosaurs, and a pyramid volcano with one candle in the middle

I had a great time making all these paper party decorations using Astrobrights Papers that turned our living room into a cheery Jurrasic world. See all the dinosaur birthday party details below.

This post contains affiliate links which means that products I recommend may give me a nominal commission at no extra cost to you. Thanks – your clicks help me make more free DIYs!

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Supplies for making DIY Dinosaur Birthday Party decorations:

Astrobrights cardstock paper:

I used lots of Astrobrights colors found in the Astrobrights 25-color card stock assortment pack; I recommend buying 2-3 packs …you’ll have some extra for other projects. Here are the colors that I used; feel free to try another color palette for your own dinosaur birthday party:

• Large geometric dinosaur: Blast-Off Blue™, Terrestrial Teal™, Celestial Blue®, Lunar Blue™, Cosmic Orange™, Galaxy Gold™, Eclipse Black™
• Geometric leaves: Gamma Green™, Vulcan Green™ and Martian Green™
• Happy birthday banner: Cosmic Orange™, Solar Yellow™ and Stardust White™
• Name banner: Rocket Red™, Cosmic Orange™, Solar Yellow™, Terrestrial Teal™ and Stardust White™
• Age: Lift-Off Lemon™ and Solar Yellow™
• Volcano stairs: Re-Entry Red™, Rocket Red™, Cosmic Orange™, Solar Yellow™, Lift-Off Lemon™, Orbit Orange™, Eclipse Black™, Gamma Green™
• Dinosaur birthday cake: Blast-Off Blue™, Terrestrial Teal™, same colors as above for volcano, same colors as above for age
• For favor tags: any and all colors above

Supporting craft supplies:

• Craft knife, metal ruler and self-healing mat
• Good paper scissors
• Removable blue painter’s tape
• Glue stick
• Hole punch – 1/4″
• Baker’s twine for hanging banner
• Coffee stir sticks for cake toppers
• Glue dots
• Washi tape
• Paper cutting machine (optional)

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Free downloadable templates for a dinosaur birthday party decor

Please visit Astrobrights.com to download free dinosaur party decor templates that I designed for Astrobrights. These dinosaur birthday party templates include:

• Large geometric dinosaur decor (34” x 34” T-Rex head)
• Geometric leaves (small and large sizes)
• Dinosaur “teeth” happy birthday bunting and name
• Ages 0-9 templates with bite marks
• Volcano stair risers with geometric lava
• Dinosaur cake toppers
• Dinosaur favor tags

Get Dinosaur Templates

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Large T-Rex geometric dinosaur party decor

The gigantic T-Rex in my living room was inspired by two things: sticker books and a trip to our favorite Chicago toy store, Building Blocks. Liam loves his Paint By Sticker activity books, and when we saw their front window that had recreated the sticker books as a large window display, I wanted to create a large geometric dinosaur above the food and cake table for Liam’s dinosaur birthday party.

First, I designed an original geometric dinosaur by hand drawing various polygons to make a T-Rex face. Next, I had to ensure that each polygon would fit onto letter-sized paper. And because I’ve done all the heavy lifting design-wise, you can just print out my free printable T-Rex geometric dinosaur birthday party template at Astrobrights.com and piece it together quickly on your wall like a giant numbered puzzle.

To make the dinosaur: Print the free template onto Astrobrights cardstock paper; the title on each page suggests the color to use. Be sure to print templates at 100% – do not “print to fit” or shrink the size to fit the paper.

Cut out pieces using a craft knife, metal ruler and self-healing mat for perfectly straight edges, or you can use paper scissors. Each piece is numbered on the back; use my legend (on page 1 of the template) to tape pieces to the wall number-side down like a puzzle using removable blue painter’s tape.

Add the T-Rex’s eye, nostril, and sharp teeth. The finished large geometric dinosaur birthday party decoration measures about 34” x 34”.

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Geometric leaves dinosaur birthday party decor

Decorate with lots of geometric paper leaves for a lush jungle effect! I designed simple geometric leaf-shape templates to coordinate with the large geometric dinosaur.

To make geometric leaves: Print the leaves template onto Astrobrights cardstock paper. Be sure to print templates at 100% – do not “print to fit” or shrink the size to fit the paper. Cut some leaves in half, then glue one half onto one side of the leaf (repeat on the back side for two-sided garland).

Attach to the wall using removable blue painter’s tape, hang as garland using a hole punch and baker’s twine, or attach to thin cut strips of card stock paper to make hanging vines.

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Dinosaur “teeth” birthday banner plus personalized name

Make a teeth-shaped happy birthday banner with personalized name. There are two sizes: small and large. Print my free printable template onto Astrobrights card stock paper and cut out using a craft knife, metal ruler and self-healing mat, or good paper scissors. Be sure to print templates at 100% – do not “print to fit” or shrink the size to fit the paper.

Print letters onto white card stock paper, cut out, and glue onto the teeth. Or you could also use the new Astrobrights sticker paper, now available at Walmart and Target.

Punch holes in the corners and hang using baker’s twine or removable blue painter’s tape. Personalize with your own letters by typing into a word processing program and printing; my small letters were 2” tall and large letters were 3” tall.

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Ages 0-9 templates with bite marks

Print your chosen age template onto Astrobrights card stock paper. Cut ½ of the number from Lift-Off Lemon™ and the other ½ from Solar Yellow™. Be sure to cut out bite marks too.

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Volcano stairs with geometric flowing lava dinosaur birthday party decor

I love decorating our living room stair risers for parties because it’s always a fun unexpected detail that surprises guests and makes them smile. I thought it would be fun to add an erupting volcano for Liam’s dinosaur birthday party. It took some math and design to get the angles right and now you can download my free volcano stairs template at Astrobrights.com.

To make the volcano stairs: Cut out 10 pieces of Eclipse Black™ paper using the printable volcano template (5 angles for the left side, 5 angles for the right). Be sure to print templates at 100% – do not “print to fit” or shrink the size to fit the paper. I designed the volcano shape to fit onto seven of our 6” stair risers; adjust as needed. Tape angled paper onto stair risers using removable blue painter’s tape. Fill in remaining middle spaces with strips of Eclipse Black™ paper.

To add paper lava: Print my lava template onto Re-Entry Red™, Rocket Red™, Cosmic Orange™ and Solar Yellow™. Cut out and add on top of the volcano. Add Gamma Green™ to the bottom stair riser as grass. Add polygons for the lava eruption from scrap paper.

Whoa watch out! The volcano is about to blow!

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Geometric volcano and dinosaur cake toppers

Paper cake toppers are an easy way to top both handmade and store bought cakes. Light one long thin candle in the middle of the volcano and make a wish!

To make the dinosaur cake toppers: Visit Astrobrights.com for my dinosaur cake toppers template. Print my dinosaur and volcano cake toppers template. Cut three volcanos, two ages, and two of each dinosaur. Cut one of the ages in half and discard the top half. Attach dinosaurs and age to wooden coffee stir sticks using glue dots.

To create the volcano: Glue stick lava onto the three volcano pieces and let dry. Attach the three volcano pieces together using washi tape on the back seams. Tape coffee stir sticks to the middle back of each volcano. Fold the volcano pieces together to form a pyramid and secure using washi tape. Stick toppers into the cake and place one long thin candle in the center of the volcano. Add dinosaur teeth-shaped paper around the cake stand edge using paper scraps and washi tape.

Liam’s cake had three 8” round layers, and I used the Cakegirls vanilla cake recipe and bakery buttercream icing recipe. Liam wanted to help ice the cake …how sweet is that?

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Dinosaur party favors printable goodie bag tags

I like to use up my paper scraps so I designed geometric dinosaurs to tie onto our dinosaur party favors. Download my free geometric dinosaur template and print onto card stock paper. You can cut these out using good paper scissors, or you can use a paper cutting machine if you have one. Or alternatively, just print the dinosaurs onto card stock and cut a polygon shape around each one to create monochromatic favor tags.

Using paper scraps, cut out random polygon shapes. Glue dinosaurs on top using a glue stick, leaving a little bit of each dinosaur falling off of the polygon to imply movement. Punch a hole in the top and tie onto favors using ribbon. Display favors in a large vase.

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Be sure to pin this DIY dinosaur birthday party for later:

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And there you have it! Liam’s 6th dinosaur birthday party was one of our best yet. The kids loved the dinosaur backdrop and the volcano stairs, the dinosaur cake and dinosaur favor tags, and best of all, Liam wants me to move the dinosaur into his room, piece-by-piece, now that he’s officially 6. Thanks again to Astrobrights for your sponsorship and inspiring paper!

Tell me in the comments below: What is your favorite geometric dinosaur birthday party idea?

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