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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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Smiling butterfly with teal and pink patterned wings, perfect for spring decor, whimsical illustrations, or lighthearted insect-themed children’s designs.
Most Likely To Get Their Tinsel In A Tangle
A vibrant collection of pinwheels in various colors and designs, perfect for playful and cheerful themes.
Cute aquatic animal pattern with dolphins, whales, fish, and squids in teal and white.
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Seamless pattern with hand-drawn green trees on a white background, ideal for nature-themed designs and wallpapers.
illustration of a cheerful, vibrant-colored duck, perfect for a children's theme
vector illustration seamless pattern with funny cartoon goldfish
Vector illustration of a wine glass in a simple doodle style. Clean and minimal design suitable for commercial use, including menus, labels, branding, or wine-themed projects.
Colorful celebration icons including masks, gifts, and balloons.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Playful cowboy and horse children's pattern for creative design projects.
A whimsical illustration of Santa Claus on horseback, blending Western cowboy elements with traditional Christmas themes. Perfect for festive holiday designs and greeting cards
illustration of a cheerful, vibrant-colored peacock, perfect for a children's theme
Colorful Halloween scene with four characters in costumes collecting falling candies. Trick-or-treating concept
Happy easter poster design featuring smiling bunny and decorated egg.
Loving Cartoon Valentine. Playful cartoon figure holding a heart on a pastel purple background with a sweet message. Perfect for Valentine’s Day cards, posters, and heartfelt designs.
Bright characters in the form of repair tools, on a blue background, demonstrating funny poses and funny facial expressions.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
A cute heart trapped in a spider web, conveying a playful theme.
A playful collage of pastel-colored hearts in various sizes with a 3D paper-cut style, arranged against a clean white background, exuding charm and lightheartedness.
illustration of a cheerful, vibrant-colored monkey, perfect for a children or kid theme
A charming line-drawn Christmas tree topped with a cowboy hat conveys a unique and playful holiday spirit. The text Oh Christmas Tree adds festive cheer to this whimsical artwor
illustration of graduation cap, perfect for a kid school or education theme
Vector illustration of a fairy with a green leaf dress, brown hair, and playful pose. Bright colors and whimsical style
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
illustration of a cheerful, vibrant-colored Beaver, perfect for a children's theme
Colorful balloons in various shapes create a playful festive atmosphere for a celebration
illustration of a cheerful, vibrant-colored pony, perfect for a children's theme
Black and white party hat design with stars for celebrations and festive occasions
Playful illustration of a sun with a friendly smile, radiating happiness and positivity. Ideal for designs focused on fun, joy, and cheerful themes. Perfect for children's materials
This pattern has a light blue background scattered with teal and white paw prints. It’s playful, cute, and perfect for pet lovers or kids’ designs.
illustration of a cheerful, vibrant-colored Koala, perfect for a children's theme
A cheerful illustration of a tree filled with colorful fruit and a smiling sun, perfect for summer themed projects.
A hilarious cartoon illustration of an animal pun
Minimalist design of clown glasses, a red nose, and a mustache on a bright blue background, symbolizing April Fools humor.
Graffiti tag “Chill Out” street art urban for Ice Cream Day, cool playful mural with sweet summer vibes.
A vibrant scattering of stylized rainbow flowers creates a lighthearted and colorful pattern against a stark white background, suggesting themes of nature, happiness, and joyful springtime bloom
Seamless vector pattern featuring paper airplanes and stars, designed with a playful children’s theme.
illustration of a cheerful, vibrant-colored hippo, perfect for a children's theme
Vibrant Blue Bubble Background with Abstract Cloud Elements - Playful and Modern Design for Kids, Winter Themes, and Creative Projects
Monster Helpers set. Each character embodies a unique work-related concept, bringing a lighthearted touch to professional themes. Vector illustration
Playful Halloween scene showing person emerging from coffin surrounded by colorful candy. Spirit of Halloween concept
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
Cute cartoon illustration of a funny girl walking under a big umbrella, perfect for playful designs, greeting cards, and cheerful weather-themed artwork.
Vector illustration of a joyful fairy with blue wings and a green dress, highlighting whimsical and magical elements
Simple repeating pattern of cute, smiling ghosts in monochrome. For Halloween-themed textiles, party decorations, web backgrounds
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
illustration of notebook, perfect for a kid school or education theme
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Illustration of a man with magnifying glass

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