55 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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Minimalist design of clown glasses, a red nose, and a mustache on a bright blue background, symbolizing April Fools humor.
Cute vector illustration of a ghost playing with spiders in a whimsical, web-covered setting. The ghost s playful expression adds a charming touch to this Halloween-themed artwork.
A striped sphere is shown in a cartoon drawing style. The playful round object is perfect for summer activities and coastal themes. Cartoon vector illustration
illustration of a cheerful, vibrant-colored penguin, perfect for a children or kid theme
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.
Stylish Coffee T-Shirt: First, I Drink Coffee. Then, I Do the Things
illustration of a cheerful, vibrant-colored bear, perfect for a children's theme
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Charming cartoon witch happily flying on a broomstick, embodying the spirit of Halloween.
Seamless Pattern Featuring Fairies with Crowns and Wands, Castles, Stars, Hearts, Swords, and Cherries. Whimsical Design in Pink and Red Tones for Kids and Fantasy Themes. Flat Vector Illustration.
illustration of a cheerful, vibrant-colored owl, perfect for a children's theme
Colorful pattern featuring playful narwhals and seashells in a whimsical underwater theme
illustration of Globe, perfect for a kid school or education theme
Set of cute onions in kawaii style on a white background, perfect for fun illustrations, children's products, and playful designs.
Vibrant pink skeleton illustration adorned with leaves and surrounded by abstract plants on a black background. Creative and whimsical design with a playful, artistic theme
A whimsical illustration of cartoon Sausages with smiling faces, displaying a playful and cheerful vibe against a dark backdrop. Perfect for fun, fantasy, and imaginative themes in various application
Birds, Petals, and Hearts Pastel Pattern
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Set, summer theme, life saving water circles, hello summer, children's illustration, pastel colors, printable set, doodle style, simple style
Colorful striped party hat ready for celebration during a festive event
uxurious spruce in a children's cartoon style"
Two cartoon fairies with golden hair in white dresses joyfully dancing, showcasing vibrant expressions and dynamic movement
Green balloons with bunny ears in a repeating pattern for festive decoration
A cartoon hippo and monkey sit beside a heart-shaped frame holding a flower in line art style. The hippo and monkey are outlined simply, creating a playful and charming scene. Cartoon vector
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.
Hand-drawn collection of vector spot art doodles with Christmas theme. Line drawing on one layer, color fills on another and shadow on bottom layer: easy to separate and recolor.
Charming fairy with a green leaf dress and bun hairstyle. Vibrant colors and whimsical style enhance the magical theme
Watercolor seamless pattern background featuring cute green creature with butterfly, tropical leaves, and flowers, perfect for wallpaper design
illustration of letter a, perfect for a kid school or education theme
Minimalist illustration of a black, curled mustache with a whimsical design, ideal for humor or April Fools themes.
Vector illustration of a fairy in two styles: line art and vibrant color. Features detailed wings and playful expression
Playful cartoon dog with brown spots and red cape, sitting with tongue out, vector style.
Fun and friendly cartoon-style vector of a smiling onggi jar. Ideal for kids' projects, educational games, or lighthearted Korean-themed content. Bright colors and playful expression. Easy to customiz
A playful pattern featuring chocolate donuts with green sprinkles and bunches of bananas on a white background. The design is vibrant and fun, perfect for food-related themes.
illustration of scissor, perfect for a kid school or education theme
Fun And Sparkly "Warning: Easily Distracted by Shiny Things" T-Shirt
illustration of a cheerful, vibrant-colored fox, perfect for a children's theme
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
vector illustration seamless pattern with funny cartoon goldfish
Fun and friendly cartoon-style vector of a smiling onggi jar. Ideal for kids' projects, educational games, or lighthearted Korean-themed content. Bright colors and playful expression. Easy to customiz
illustration of a cheerful, vibrant-colored Flamingo, perfect for a children's theme
illustration of a cheerful, vibrant-colored Giraffe, perfect for a children's theme
Funny snail for children's cartoon vector illustration
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
Embrace humor with this witty MS-themed t-shirt. Featuring a playful design, it highlights the overactive immune system with a touch of comedy. Perfect for awareness and support.
This adorable cartoon ghost character holds a playful pumpkin, capturing the spirit of Halloween festivities. Perfect for seasonal decorations or joyful illustrations.
illustration of a cheerful, vibrant-colored Raccoon, perfect for a children's theme
Playful and adorable vector illustration of a cartoon llama with a decorative blanket
Charming multicolored chicken for children's cartoon illustrations
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Illustration of a man with magnifying glass

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