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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 “Chill Out” street art urban for Ice Cream Day, cool playful mural with sweet summer vibes.
illustration of a cheerful, vibrant-colored Octopus, perfect for a children's theme
Colorful umbrellas and fluffy clouds with stylized raindrops. A fun weather-themed design with a vibrant blue background. Great for children’s fabric prints and rainy season decorations.
Pattern features scattered cream cupcakes with swirled tops on a rich chocolate brown background, creating a fun, sweet, and playful vibe perfect for dessert themes.
illustration of pencil and erase, perfect for a kid school or education theme
Cute koala riding ufo cartoon
A whimsical fairy with colorful wings and playful expression, rendered in a detailed vector style with vibrant colors
Vector illustration of a funny stele with eyes in a children's cartoon style, perfect for fairy tale-themed designs.
illustration of a cheerful, vibrant-colored mouse, perfect for a children's theme
Playful ghost character enthusiastically shouting "Boo" with raised arms, embodying the fun and festive spirit of Halloween
Adorable kawaii-style cake illustration featuring dripping white frosting, a pink bow, and a pastel purple background. Perfect for playful, sweet-themed design projects
watercolor vector illustration poster with positive quote Enjoy little things
A vibrant collection of pinwheels in various colors and designs, perfect for playful and cheerful themes.
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 whimsical male fairy with blue wings, wearing green attire. Vibrant colors and playful expression enhance the fantasy theme
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
Bright floral and egg pattern design for spring celebration or decoration
A vibrant cartoon-style chicken featuring a cheerful expression. Perfect for projects related to farm life, education, and children's themes.
Ghost Marshmallow on a Stick, Perfect for Halloween Themes and Cute Designs
Black and white hand drawn doodles fill this simple vector background, offering a lighthearted children’s theme with basic shapes and friendly, joyful illustrations.
Cartoon Panda Bear with Heart Balloons Illustration
Flat style illustration of a charming blue mailbox filled with red roses and a love letter, perfect for Valentine's Day designs, romantic messages, or sweet themed projects.
illustration of a cute, vibrant-colored elephant, perfect for a children's theme
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Kiss a Ginger Day – January 12, 2025, Attractive design, can be used on all social media platforms, beautiful color combination, get it now for the first purchase.
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
Cute Ghost Raccoon Flat Design. Adorable vector illustration of a raccoon dressed in a white ghost sheet costume with a pink bowtie, perfect for lighthearted Halloween themes.
Playful Halloween scene showing person emerging from coffin surrounded by colorful candy. Spirit of Halloween concept
illustration of a cheerful, vibrant-colored rabbit, perfect for a children or kid theme
Delicate pastel wildflowers scattered on a dark indigo background.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Seamless Pattern Featuring Princesses with Crowns, Fairies with Wings and Wands, and Hearts. Magical Composition on Light Background. Decorative Design for Kids and Fantasy Themes. Vector Illustration
Colorful Cartoon Bird Flying Happily Among Blue Clouds and Open Sky
illustration of a cheerful, vibrant-colored zebra, perfect for a children's theme
An adorable seamless pattern featuring cute baby hippos enjoying a dip in basin, accompanied by whole and sliced watermelons. The hippos are illustrated in a playful style.
Blue balloons floating above the word baby for a celebration
Playful bubble pattern background in vector format, editable EPS 10 file. Ideal for children's designs, aquatic themes, and cheerful branding projects with a lighthearted aesthetic
illustration of a cheerful, vibrant-colored penguin, perfect for a children or kid theme
Smiling orange clown cupcake with curly hair, red clown nose, and a party hat, perfect for April Fools celebrations.
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
illustration of chalkboard, perfect for a kid school or education theme
illustration of a cheerful, vibrant-colored sheep, perfect for a children's theme
A cartoon-style vector illustration of a cactus with the word Wanted above it. The cactus is green with multiple arms, set against a white background.
illustration of a vibrant-colored Giraffe, perfect for a children or kid theme
A playful vector pattern featuring brown horses and red hearts on a white background, ideal for children's designs or romantic themes.
illustration of a cheerful, vibrant-colored pony, perfect for a children's theme
vector illustration seamless pattern with cute cartoon goldfish
A seamless pattern of pastel and black balloons floating on a white background.
watercolor vector illustration poster with positive quote Enjoy little things
Cute kawaii-style spell book with pastel colors and magical details. Perfect for Halloween, fantasy-themed designs, children’s illustrations, magical merchandise, and mystical projects.
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Illustration of a man with magnifying glass

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