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56 lighthearted theme designs graphics for t-shirt and print on demand merch

Download lighthearted theme t-shirt designs and other merch graphics like book covers, phone cases, tote bags and more.

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Adorable kawaii-style cake illustration featuring dripping white frosting, a pink bow, and a pastel purple background. Perfect for playful, sweet-themed design projects
A drawing of a pair of kidneys with black and white lines. The drawing is in a cartoon style and has a playful, lighthearted mood
A seamless vector pattern featuring brown horses and sheriff stars on a white background. The horses are depicted in a playful, cartoonish style, adding a whimsical touch to the design.
Cute koala riding ufo cartoon
Adorable cartoon bear holding a big orange heart with floating hearts above. Perfect for Valentines Day, love, and friendship themes. Cute Bear Holding Heart with Love
Colorful gift ribbon bow design, perfect for adding a vibrant touch to any present. Illustration enhances gift wrapping, making it ideal for holidays, celebrations, and special occasions
ink heart with wings in a whimsical vector illustration, symbolizing love, affection, and romance. Ideal for Valentine's Day themes or romantic design elements.
A lighthearted ghost hovers next to a bold letter G, creatively representing the term ghosting, This artistic display brings a fun twist to a modern communication theme.
Seamless pattern with hand-drawn green trees on a white background, ideal for nature-themed designs and wallpapers.
Cloud with stars on a thread. On a white background
A Cute cloud with smiling face and lightning bolt below, representing playful stormy theme
Playful skull characters with various accessories for a fun Halloween theme.
A cartoon hippo and monkey sit beside a heart-shaped frame holding a flower in line art style. The hippo and monkey are outlined simply, creating a playful and charming scene. Cartoon vector
Camouflage Dove of Peace with Olive Branch
A whimsical cartoon illustration of a cute mummy wrapped in bandages, set against a vibrant pink background with stars and moons. Perfect for Halloween or fantasy themes
Blue polka dot balloon in cartoon style, vector illustration
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
Sweet illustration of a white puppy with pink ears sitting on a pastel mint green background. Perfect for lighthearted and joyful design themes.
A seamless pattern featuring various cartoon-style clouds on a white background.
A cheerful cartoon man with raised arms, expressing joy and celebration. Perfect for themes of happiness and positivity
Kiss a Ginger Day – January 12, 2025, Attractive design, can be used on all social media platforms, beautiful color combination, get it now for the first purchase.
A delightful array of cartoon-style animal characters is displayed in vibrant colors. Each character exhibits unique features, creating an engaging visual ideal for children’s books or merchandise.
illustration of a cheerful, vibrant-colored tiger, perfect for a children or kid theme
Certified April Fools' Day T-Shirt Design - "Laugh Out Loud Guaranteed!"
Colorful turquoise balloons with flowing strings create a festive background pattern
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Seamless pattern of smiling blue clouds, suitable for children's designs
Squash Your Goals. Features playful pumpkin characters with whimsical details. Retro illustration style with hand-drawn lettering pumpkin themed pun. Warm yellow, green, and orange color palette.
A whimsical seamless Halloween pattern series featuring pumpkins, ghosts, stars, and foliage — designed in three colorways: cozy cream, dramatic midnight, and trendy pastel.
Colorful celebration icons including masks, gifts, and balloons.
Cartoon Turtle in Nature – A cheerful green turtle standing on sandy ground with grass and a rock, under a bright blue sky. Ideal for kids' illustrations, storybooks, or nature-themed content.
illustration of graduation cap, perfect for a kid school or education theme
Children's cartoon animals with nature elements"
Fun love-themed stickers featuring hearts, gifts, and sweet treats
A collection of 5 ukulele logo designs inspired by tropical, lighthearted, and creative themes. Perfect for music schools, island branding, or artistic businesses.
illustration of a cheerful, vibrant-colored zebra, perfect for a children's theme
A playful vector pattern featuring watches, hammers, and mustaches, ideal for a quirky design or fabric print.
illustration of backpack, perfect for a kid school or education theme
Watercolor seamless pattern background featuring cute green creature with butterfly, tropical leaves, and flowers, perfect for wallpaper design
illustration of a cheerful, vibrant-colored bear, perfect for a children's theme
illustration of a cute, vibrant-colored capybara, perfect for a children's theme
illustration of a cheerful, vibrant-colored cat, perfect for a children's theme
Web page design template. Adorable Cartoon Cat Collection With Fun Summer and Adventure Themes
watercolor vector illustration poster with positive quote Enjoy little things
illustration of a cheerful, vibrant-colored sheep, perfect for a children's theme
Minimalist vector illustration of a heart and envelope in doodle style. Romantic theme with playful lines, deep red accents, and beige background. Ideal for Valentines Day or love-themed designs
illustration of a cheerful, vibrant-colored lion, perfect for a children or kid theme
Abstract composition with lively pink and blue doodles, fun forms and artistic freehand strokes in a modern creative style.
Stylish Coffee T-Shirt: First, I Drink Coffee. Then, I Do the Things
illustration of a cheerful, vibrant-colored chicken, perfect for a children's theme
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Illustration of a man with magnifying glass

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