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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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Vector illustration of a cute baseball ball mascot happy dancing. Features a joyful character with a big smile, lively movements, and a festive atmosphere, perfect for sports-themed designs
Egg Balancing on Nose for Fun Trick or Challenge Theme
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Join us for a spooktacular evening at our Halloween party! Featuring colorful and playful monsters, this event promises fun and festive activities for all ages. Don’t miss out on the eerie excitement
Discover the hilarious and absurd world of zombie survival in this lighthearted comedy. Find out why you're perfectly safe from the undead menace and laugh along as these brain-hungry creatures stumbl
2D Space Man Cartoon with moon ballon in lovely funny style.
Cute cartoon ghost with chains saying "Boo " This playful character is ideal for Halloween-themed, vector illustration.
Fairytale Characters and Elements for Kids. Princesses, Unicorns, Fairies, Castles, Dragons, Flowers, and Hearts. Magical Composition Isolated on Light Background. Flat Vector Illustration
Seamless vector Valentine's Day template with a scattering of soft pink hearts in cartoon style
A festive Halloween design features the words "Happy Halloween" in colorful letters, adorned with spooky elements like bats, candles, and pumpkins, against a soft pink background.
Celebration pattern featuring champagne glasses and bottles with hearts
Funny clowns and festive balloons, hand-drawn, doodle style
A playful kitten engrossed in reading, ideal for children's book illustrations or educational content.
Funny T-Shirt Design: I Put the Pro in Procrastinate with Humor Icons
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
Colorful cartoon tank against playful background with speech bubbles and warning signs
A Cute cloud with smiling face and lightning bolt below, representing playful stormy theme
illustration of a cheerful, vibrant-colored dolphin, perfect for a children's theme
illustration of a cheerful, vibrant-colored monkey, perfect for a children's theme
Certified April Fools' Day T-Shirt Design - "Laugh Out Loud Guaranteed!"
Cute Tree with Birds on Branches in a Children's Cartoon Style
A playful cartoon boy eagerly eating worms, showcasing humor and adventure in a colorful vector style
Design a group of super cute cartoon ghosts to go with Halloween.
A whimsical illustration of Santa Claus on horseback, blending Western cowboy elements with traditional Christmas themes. Perfect for festive holiday designs and greeting cards
Adorable and fun elephant illustration sticker. Vector illustration design.
Cheerful laughing mango character. Playful fruit illustration perfect for food mascots and children educational themes.
This vector features a croissant with a happy expression, bright colors, and a simple cartoon style, ideal for bakery or food themes, cheerful and playful.
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
A Cute Cartoon Mummy Character Wrapped in Bandages Perfect for Halloween-Themed Illustrations and Decorations, Evoking Fun and Whimsy
Colorful striped balloon in cartoon style, vector illustration
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.
Rounded orange abstract elements at corners with floating dots on white, playful and dynamic, fits youth-themed wrapping or wall sticker.
Bright and cheerful illustration of yellow flowers, creatively arranged with decorative tape. Perfect for designs, seasonal themes, crafting projects, or adding a touch of nature-inspired charm.
A drawing of a pair of kidneys with red, blue and yellow lines. The drawing is in a cartoon style and has a playful, lighthearted mood
Playful, smiling ghosts dance across a bright background in a charming Halloween pattern, text Boo
Delicate transparent balloons floating upwards, perfect for party themes, celebration designs, or whimsical event visuals. Ideal for invitations, decorations, or lighthearted branding.
A seamless vector pattern featuring brown horses and sheriff stars on a white background. The horses are depicted in a playful, cartoonish style, adding a whimsical touch to the design.
Simple repeating pattern of white ghosts on a dark blue backdrop, for Halloween decorations, textile prints, event branding
illustration of a cheerful, vibrant-colored cat, perfect for a children's theme
A Cute sloth wearing graduation cap, symbolizing achievement and celebration
Adorable puppy with a red scarf holds a blue number four balloon. Bright, playful vector illustration with a cheerful theme
Playful seamless Oktoberfest pattern featuring a cartoon waiter and waitress in traditional German outfits, surrounded by beer, sausages, pretzels, and party icons. Childlike naive style. 1:1 format.
illustration of a cheerful, vibrant-colored zebra, perfect for a children's theme
Bright and playful April 1 text on a light blue cloud shape, perfect for April Fools Day themes and celebrations.
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
A playful vector illustration featuring three cartoon ghosts in various poses, each with unique facial expressions, showcasing a whimsical and lighthearted Halloween theme.
illustration of a cheerful, vibrant-colored Crocodile, perfect for a children's theme
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.
Cute aquatic animal pattern with dolphins, whales, fish, and squids in teal and white.
Whimsical floral and abstract shapes seamless pattern design.
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Illustration of a man with magnifying glass

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