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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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A set of pastel balloons — mint green, peach, lavender, orange and sky blue — lift a rectangular sign hand-lettered with “Back to school” against a soft gradient blue sky.
Moon-shaped balloon floating against a minimal background
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
Vibrant illustration of a jester hat with red, green, and blue panels and yellow pom-poms, perfect for festive themes.
illustration of a cheerful, vibrant-colored rabbit, perfect for a children or kid theme
The playful text "Quack" above adds a fun and whimsical touch, making this design perfect for children's products, nature-themed events, or anything related to ducks.
Seamless vector pattern featuring paper airplanes and stars, designed with a playful children’s theme.
Delicate pastel wildflowers scattered on a dark indigo background.
Whimsical Monkeys: Funny Monkey Faces Vector Illustration Set
Fluffy clouds and stylized raindrops on a fresh green background. A cheerful seamless pattern perfect for kids’ fabric, decor, and rainy day themes.
Seamless vector Valentine's Day template with a scattering of soft pink hearts in cartoon style
A playful vector pattern featuring alternating black mustaches and red bow ties on a white background, creating a whimsical and fun design.
Hand drawn Halloween vector seamless pattern with cute ghost cats and candies. Whimsical cartoon background with ghost cats with sweets for spooky design, prints, textile. Festive pattern with kittens
Minimal black outline of a fluffy cloud with a smiling face. Cartoon-style design evokes friendliness, good weather, and emotional lightness in nature or children's themes.
Seamless Pattern of Mermaids with Crowns, Seashells, Starfish, Fish, and Seaweed. Playful Marine Theme on Light Background. Decorative Design for Kids and Fantasy Stories. Flat Vector Illustration
Clown in a cupcake costume on a purple background with a blank speech bubble, perfect for April Fools or humor themes.
Bright smiling sun with rays shining in a cheerful illustration perfect for summer-themed designs, children's artwork, or sunny day activities
illustration of a vibrant-colored Giraffe, perfect for a children or kid theme
illustration of a cheerful, vibrant-colored lion, perfect for a children or kid theme
Colorful pattern featuring playful narwhals and seashells in a whimsical underwater theme
Charming smiling blue cloud face cartoon perfect for children's designs. Vector Illustration.
Playful seamless pattern featuring smiling suns with a cartoonish aesthetic. Cheerfulness and optimism. Flat, Minimalist style emphasizes simplicity and charm. Whimsical and friendly. Uplifting vibe.
Vector illustration of a green balloon shaped as number three tied to a blue lizard. Bright colors and playful composition
A vibrant cartoon-style chicken featuring a cheerful expression. Perfect for projects related to farm life, education, and children's themes.
Unique black balloons in various shapes for decoration or celebration
ink heart with wings in a whimsical vector illustration, symbolizing love, affection, and romance. Ideal for Valentine's Day themes or romantic design elements.
2D Space Man Cartoon with moon ballon in lovely funny style.
A festive Halloween design features the words "Happy Halloween" in colorful letters, adorned with spooky elements like bats, candles, and pumpkins, against a soft pink background.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Charming retro style floral pattern with simple blossoms and leaves on a teal background
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
A whimsical collection of pastel-colored doodle elements featuring rainbows, cats, stars, houses, flowers, and nature icons. Perfect for children’s designs, stationery, digital scrapbooking, and playf
A colorful cartoon-style vector illustration of a boat with a large, vibrant sail floating on calm waters, with a bright sky and fluffy clouds in the background.
Seamless vector pattern of pastel blue Easter eggs with chevron and dot decorations on a white background.
Trendy Soft Pink Petal Pattern
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.
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 playful vector pattern featuring cartoon-style horses, red hearts, and sheriff stars on a white background. The design is vibrant and whimsical, suitable for children's products or playful themes.
A cute heart trapped in a spider web, conveying a playful theme.
This image showcases a stylized blue monarch butterfly with abstract patterns. The minimalist design highlights intricate details and artistic flair, perfect for creative projects and nature
illustration of chalkboard perfect for a kid school or education theme
Funny skeleton waves cheerfully against a black background, perfect for Halloween decorations and themes
Three pastel teal hearts are floating on a white background, creating a simple yet charming design suitable for various romantic or affectionate themes
illustration of a cute, vibrant-colored capybara, perfect for a children's theme
Adorable farm animals and plants in a cartoon vector illustration
illustration of a cheerful, vibrant-colored Raccoon, perfect for a children's theme
Simple festive round frame with Christmas tree decorations. simple vector design is ideal for New Year and Christmas decorations
illustration of a cheerful, vibrant-colored duck, perfect for a children or kid theme
Cartoon hand walking with fingers on a white background, illustrating themes of communication, movement, and playful interaction in a vibrant and inviting manner
illustration of a cheerful, vibrant-colored Crocodile, perfect for a children's theme
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Illustration of a man with magnifying glass

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