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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.
Abstract composition with lively pink and blue doodles, fun forms and artistic freehand strokes in a modern creative style.
A playful cartoon boy eagerly eating worms, showcasing humor and adventure in a colorful vector style
Cute Valentine's Day Heart-Shaped Candies with Messages
A whimsical fairy with pointed ears and a vibrant blue dress, exuding joy and magic in a playful pose
A seamless pattern featuring adorable kawaii tiger cubs. The vibrant colors and charming designs make this illustration perfect for fabric, wallpapers, and childrens products.
Brave cat character wearing knight armor with a helmet and cape, ready for adventure in a fun and playful style
A whimsical seamless Halloween pattern series featuring pumpkins, ghosts, stars, and foliage — designed in three colorways: cozy cream, dramatic midnight, and trendy pastel.
Cartoon fridge with eyes and mouth sticking out of it. This playful asset is perfect for children's illustrations, kitchen-themed designs, and quirky product packaging.
Charming Autumn Illustrations Featuring Cute Characters and Cozy Rainy Day Scenes
Seamless Easter-themed pattern featuring playful bunnies with eggs, colorful rainbows, carrots, and baskets of eggs on a light gray background. Perfect for seasonal designs.
This adorable cartoon ghost character holds a playful pumpkin, capturing the spirit of Halloween festivities. Perfect for seasonal decorations or joyful illustrations.
Watercolor seamless pattern background featuring cute green creature with butterfly, tropical leaves, and flowers, perfect for wallpaper design
Charming cartoon witch happily flying on a broomstick, embodying the spirit of Halloween.
seamless floral pattern with doodle style flower icons for fun textile and wrapping
vector illustration bright seamless pattern with cartoon goldfish
Colorful cartoon birds are joyfully dancing across a clean white background. The playful characters delight the viewer with their whimsical and cheerful expressions, perfect for children's decor.
illustration of a cheerful, vibrant-colored Chameleon, perfect for a children's theme
vector illustration seamless pattern with funny cartoon goldfish
Cute and playful spider webs with spiders for a festive Halloween touch.
Playful ghost character enthusiastically shouting "Boo" with raised arms, embodying the fun and festive spirit of Halloween
illustration of a cute, vibrant-colored capybara, perfect for a children's theme
Charming ghost character dressed in a witch hat while holding a pumpkin bucket, embodying the playful side of Halloween celebrations
A cute mouse holding cheese, tied to a golden balloon. Bright colors and playful composition enhance the whimsical style
illustration of a cheerful, vibrant-colored shark, perfect for a children's theme
A collection of playful stickers showcasing adorable animals and love symbols in lovely pastel shades. Perfect for decorating journals or personal items, these designs evoke a cheerful vibe.
vector illustration of a bright cartoon goldfish
vector illustration of a cute goldfish in cartoon style
illustration of a cheerful, vibrant-colored Raccoon, perfect for a children's theme
vector illustration joyful seamless pattern with cartoon goldfish
vector illustration seamless pattern with cute cartoon goldfish
vector illustration of an adorable cartoon goldfish
A lighthearted and whimsical illustration of a female heart character holding a playful accessory. A charming design with a subtle hint of grown-up flair.
Web page design template. Adorable Cartoon Cat Collection With Fun Summer and Adventure Themes
This playful t-shirt print showcases fun cartoon work tools alongside the humorous quote Daddy’s little builder. Perfect for kids goods, toys
Graffiti tag “Mood On” street art urban for World Emoji Day, colorful mural full of fun and expressive vibes.
Vector illustration of a joyful fairy child with vibrant colors and expressive features, showcasing a playful and whimsical style
Charming fairy illustration with vibrant colors, featuring a green dress and blue wings, expressing joy and whimsy
Whimsical skeleton dancing happily with a stylish hat and festive orange accents creating a joyful spooky vibe
Charming fairy illustration with vibrant colors, featuring a green dress and blue wings. Playful pose and cheerful expression
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.
Two cartoon fairies with golden hair in white dresses joyfully dancing, showcasing vibrant expressions and dynamic movement
Ocean-themed vector illustration featuring a sailboat, seagulls, a lighthouse, and charming sea creatures like a crab and starfish. Perfect for nautical-themed designs and projects.
A whimsical fairy with colorful wings and playful expression, rendered in a detailed vector style with vibrant colors
Colorful funny travel holiday themed pattern with hot air balloons, sunglasses, and maps.
A seamless pattern featuring various cartoon-style clouds on a white background.
Cute Ghost Pattern with Boo Speech Bubble Seamless Pattern. Perfect for Halloween designs, creating a playful atmosphere.
Clown in a cupcake costume on a purple background with a blank speech bubble, perfect for April Fools or humor themes.
A seamless pattern with ice cream, perfect for adding a playful and sweet touch to any summer-themed design.
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Illustration of a man with magnifying glass

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