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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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Graffiti tag “Lazy Vibes” street art urban for Hammock Day, chill mural with relaxing summer mood.
Cheerful children joyfully holding balloons sit together, perfect for birthday invitations and party themes
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.
illustration of a cheerful, vibrant-colored wolf, perfect for a children's theme
Set of cute onions in kawaii style on a white background, perfect for fun illustrations, children's products, and playful designs.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Whimsical skeleton dancing happily with a stylish hat and festive orange accents creating a joyful spooky vibe
Playful ghost character peeking from behind a gravestone with RIP inscription, adding a lighthearted touch to Halloween celebrations
Cute animated lion wearing cap and gown, celebrating graduation, suitable for educational or celebratory content.
Ghosts with Flowers on Orange Background
Hand drawn seamless sunny pattern with yellow happy faces. A fun and lighthearted background perfect for nursery rooms, stationery, wallpapers, and childrens summer themes
Seamless pattern of smiling blue clouds, suitable for children's designs
Cute and Cartoonish Bunnies: Adorable bunny clip art featuring chubby cheeks, expressive eyes, and endearing poses, perfect for creating charming and lighthearted Easter-themed content.
Cute Ghost Pattern with Boo Speech Bubble Seamless Pattern. Perfect for Halloween designs, creating a playful atmosphere.
Vector illustration of a fairy with blue wings, blonde hair, and green attire. Bright colors and playful expression enhance the whimsical theme
Fun Prankster T-Shirt Design - Prankster in Action Day 2025
Flat-style seamless pattern of dumplings on a vibrant pink background. Perfect for culinary-themed designs, food packaging, and creative branding projects.
Vector illustration of a joyful fairy child with vibrant colors and expressive features, showcasing a playful and whimsical style
illustration of a cheerful, vibrant-colored Squirrel, perfect for a children's theme
illustration of notebook perfect for a kid school or education theme
illustration of a cheerful, vibrant-colored tiger, perfect for a children or kid theme
Charming cartoon witch happily flying on a broomstick, embodying the spirit of Halloween.
Minimalist design of clown glasses, a red nose, and a mustache on a bright blue background, symbolizing April Fools humor.
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
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
Seamless Pattern With Dog and Cat Vector, in the Style of Light Black and Red, Linear Patterns and Shapes, Humor Meets Heart, Animated Gifs, Catcore, Stenciled Iconography, Shaped Canvas
Ghost Marshmallow on a Stick, Perfect for Halloween Themes and Cute Designs
Colorful pirate pattern with cartoon characters and treasure chests.
illustration of a cheerful, vibrant-colored penguin, perfect for a children or kid theme
Charming black and white vector illustration of a horse with a braided mane and a decorative floral pattern. Ideal for children s designs, animal-themed projects, and more.
seamless floral pattern with doodle style flower icons for fun textile and wrapping
illustration of a cheerful, vibrant-colored duck, perfect for a children or kid theme
illustration of a cute, vibrant-colored capybara, perfect for a children's theme
watercolor vector illustration poster with funny quote when in doubt look intelligent
A cartoon avocado rides a surfboard on ocean waves, enjoying a fun and playful moment. The cheerful character brings a lighthearted and tropical vibe, perfect for summer and adventure themes
A charming outline illustration of a ghost riding a ferris wheel evoking themes of Halloween fun amusement parks and lighthearted spooky adventures.
Unique cat-shaped balloon floats against a plain backdrop
Moon-shaped balloon floating against a minimal background
illustration of a cheerful, vibrant-colored cow, perfect for a children's theme
A cheerful cartoon character with a round yellow body, big eyes, and a wide smile holds a potted sunflower. The character wears gloves and sneakers, walking energetically on a beige background.
A repeating vector pattern featuring cowboy hats, sheriff stars, and rope coils on a white background. The design has a playful, western theme, ideal for textiles or children's decor.
This pattern has cute white bunnies with purple carrots scattered on a teal background, creating a playful, whimsical, and fun design perfect for kids or Easter themes.
Cartoon Girl in Bikini Standing on Tropical Beach with Palm Tree
Cartoon Moon Character Playing Video Game with Controller – Cute and Whimsical Nighttime Illustration
This kids t-shirt design showcases cartoon work tools alongside the playful quote my tools my rules, perfect for inspiring little builders' imaginations during playtime or casual outings.
Vector illustration of a cute squirrel wearing a hat and scarf, surrounded by colorful autumn leaves. Features a playful pattern with acorns and clouds to create a seasonal atmosphere.
Pattern features scattered cream cupcakes with swirled tops on a rich chocolate brown background, creating a fun, sweet, and playful vibe perfect for dessert themes.
A cheerful and minimalistic party-themed planner or calendar template featuring a soft pastel yellow background
Playful, smiling ghosts dance across a bright background in a charming Halloween pattern, text Boo
illustration of a cheerful, vibrant-colored penguin, perfect for a children or kid theme
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Illustration of a man with magnifying glass

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