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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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Flat Vector Illustration of Seamless Pattern Combining Abstract Floral and Strawberry Elements. Vibrant Pink, Yellow, and Green Color Palette. Design for Backgrounds, Textiles, Wrapping Paper
Moon-shaped balloon floating against a minimal background
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.
Watercolor seamless pattern background featuring cute green creature with butterfly, tropical leaves, and flowers, perfect for wallpaper design
illustration of pencil and eraser perfect for a kid school or education theme
Colorful Cartoon Bird Flying Happily Among Blue Clouds and Open Sky
Cute outline snake illustration with Santa hat and Christmas lights, with playful and festive holiday theme. Vector hand drawn drawing isolated on white background for coloring pages
illustration of a cheerful, vibrant-colored penguin, perfect for a children or kid theme
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
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.
illustration of a cheerful, vibrant-colored zebra, perfect for a children's theme
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
Vector illustration of a playful black cat lounging on a broomstick, surrounded by Halloween-themed elements and text promoting a party on October 31. Perfect for festive invitations.
A seamless pattern of pastel and black balloons floating on a white background.
Adorable sloth illustration hanging on a tree branch, perfect for childrens designs, animal-themed projects, or playful prints.
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
Illustration of four colorful outlined heart shapes arranged around the word LOVE in bold letters. Modern romantic design on a white background for Valentine's Day or love-themed projects.
Seamless vector pattern featuring adorable cartoon sheep wearing Santa hats and festive holly sprigs, perfect for Christmas-themed designs and winter celebrations.
Charming illustration of a funny gift box character with a playful expression. This whimsical design is perfect for adding a joyful touch to greeting cards, party invitations, and festive decorations
illustration of cute Giraffe, perfect for a children or kid theme
Just Be Cool T-shirt Design Featuring a Cartoon Bear on a Scooter
illustration of a cheerful, vibrant-colored monkey, perfect for a children's theme
A collection of cartoon-style coronavirus characters showcasing a range of emotions like happiness, sadness, confusion, and frustration, adding a playful touch to serious themes.
illustration of a cheerful, vibrant-colored owl, perfect for a children's theme
Monster Helpers set. Each character embodies a unique work-related concept, bringing a lighthearted touch to professional themes. Vector illustration
A cute halloween themed illustrations featuring various characters like ghosts, skulls
Charming fairy illustration with vibrant colors, featuring a green dress and blue wings, expressing joy and whimsy
illustration of a cheerful, vibrant-colored bear, perfect for a children's theme
illustration of a cheerful, vibrant-colored bear, perfect for a children's theme
illustration of a cheerful, vibrant-colored monkey, perfect for a children or kid theme
Cute cartoon chicken with big eyes and red bow tie. Vector design and PNG transparent background perfect for children content and farm-themed designs
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.
Smiling butterfly with teal and pink patterned wings, perfect for spring decor, whimsical illustrations, or lighthearted insect-themed children’s designs.
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 whimsical fairy in vibrant colors and outline style, featuring delicate wings and a playful pose
Cute seamless pattern design featuring playful hand drawn fish for kids design vector illustration
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
illustration of a cute, vibrant-colored elephant, perfect for a children's theme
A whimsical fairy with colorful wings and playful expression, rendered in a detailed vector style with vibrant colors
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.
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.
illustration of crayons perfect for a kid school or education theme
A fun and colorful pattern featuring chocolate donuts with green sprinkles and pineapples on a white background. Ideal for food-related designs or playful themes.
Adorable farm animals and plants in a cartoon vector illustration
image captures the essence of fall with a playful twist. A variety of autumn leaves in warm shades of yellow, orange, green, and red overlap each other creating a rich tapestry of seasonal colors.
A funny skeleton dances joyfully on a black background, demonstrating its playful charm with funny gestures.
illustration of bell, perfect for a kid school or education theme
illustration of Globe, perfect for a kid school or education theme
illustration of a cheerful, vibrant-colored cow, perfect for a children's theme
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Illustration of a man with magnifying glass

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