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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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.
vector illustration of a bright cartoon goldfish
illustration of chalkboard perfect for a kid school or education theme
Colorful turquoise balloons with flowing strings create a festive background pattern
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
A seamless weather-themed pattern featuring playful depictions of rainbows, suns, clouds, raindrops, and lightning. Hand drawn vector image.
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 a cheerful, vibrant-colored mouse, perfect for a children's theme
Cute cartoon illustration of characters holding red hearts, symbolizing love and connection. Minimalist style with black outlines and red accents adds charm. Valentines theme
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.
A colorful cartoon-style vector illustration of a boat with a large, vibrant sail floating on calm waters, with a bright sky and fluffy clouds in the background.
Abstract composition with lively pink and blue doodles, fun forms and artistic freehand strokes in a modern creative style.
illustration of a cheerful, vibrant-colored snake, perfect for a children's theme
Ice Cream Cartoon T-shirt Design with Fun, Colorful, and Playful Graphics
Seamless Pattern of Playful Dancing Skeletons on Dark Background: Halloween-Themed Design
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Flat-style illustration of a red mailbox filled with love letters and a note saying With love, perfect for Valentine's Day designs, romantic greetings, or cute themed projects.
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.
illustration of a cheerful, vibrant-colored mouse, perfect for a children's theme
Funny snail for children's cartoon vector illustration
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 hilarious cartoon illustration of an animal pun
Cute pink girly vector pattern featuring playful bears and whimsical hearts. Vector illustration
A whimsical pink balloon with white stripes, featuring a curly dark string. Ideal for children's themes, festive events, or creative designs needing a playful touch
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Clever cat character wearing a detective hat and a cloak, holding a magnifying glass with a playful and mysterious flair
A charming digital illustration featuring an adorable bunny, a cheerful chick, and a fluffy lamb on a light blue background. Perfect for Easter-themed designs, greeting cards, and children's projects.
Cheerful laughing mango character. Playful fruit illustration perfect for food mascots and children educational themes.
Graffiti tag “Chill Out” street art urban for Ice Cream Day, cool playful mural with sweet summer vibes.
Monster Helpers set. Each character embodies a unique work-related concept, bringing a lighthearted touch to professional themes. Vector illustration
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.
Stylish Coffee T-Shirt: First, I Drink Coffee. Then, I Do the Things
Camouflage Dove of Peace with Olive Branch
illustration of a cheerful, vibrant-colored monkey, perfect for a children or kid theme
illustration of a cheerful, vibrant-colored duck, perfect for a children or kid theme
Playful Blue Jellyfish Character Illustration
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
illustration of notebook, perfect for a kid school or education theme
Fun Prankster T-Shirt Design - Prankster in Action Day 2025
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.
Happy baby panda holding pastel balloons, smiling with joy on a light blue background
illustration of a cheerful, vibrant-colored turtle, perfect for a children's theme
Fluffy clouds and stylized raindrops on a fresh green background. A cheerful seamless pattern perfect for kids’ fabric, decor, and rainy day themes.
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 cute penguin, perfect for a children or kid theme
Cartoon-style burglar dressed in warm clothes with a sack, symbolizing crime, mystery, and detective themes in a lighthearted, animated design
Seamless vector pattern featuring adorable cartoon sheep wearing Santa hats and festive holly sprigs, perfect for Christmas-themed designs and winter celebrations.
Vibrant cartoon drawing of happy hippo grinning widely, adding playful and joyful vibe to any design or artwork, perfect for children illustrations or fun themes. Vector illustration.
A friendly ghost floats above a pumpkin with cute clouds in the background, all set against a bright yellow backdrop. Perfect for playful Halloween designs or children's themes.
vector illustration of an adorable cartoon goldfish
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Illustration of a man with magnifying glass

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