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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illustration of a cheerful, vibrant-colored monkey, perfect for a children's theme
illustration of paint brush, perfect for a kid school or education theme
uxurious spruce in a children's cartoon style"
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
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Cute orange cat practicing mindfulness, surrounded by positive emotions, perfect vector for mental health and self-care themes
illustration of a cheerful, vibrant-colored monkey, perfect for a children or kid theme
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Playful And Trendy "I’m a Snack, Not a Meal" T-Shirt
Moon-shaped balloon floating against a minimal background
Red balloons with strings arranged in a fun pattern on a white background
Seamless pattern with adorable Cartoon Cat Collection With Fun Summer and Adventure Themes
Set of vector square stickers. Black silhouettes of dogs in sunglasses riding a skateboard and a carousel on a bright background. Add some lighthearted fun to your animal-themed projects.
illustration of a cheerful, vibrant-colored rabbit, perfect for a children or kid theme
A cheerful cartoon character with a round yellow body, big eyes, and a wide smile holds a potted sunflower. The character wears gloves and sneakers, walking energetically on a beige background.
A set of pastel balloons — mint green, peach, lavender, orange and sky blue — lift a rectangular sign hand-lettered with “Back to school” against a soft gradient blue sky.
Cartoon pirate pattern with child characters on dark background.
illustration of a cute, vibrant-colored elephant, perfect for a children's theme
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
A playful "Funny Palm Tree" cartoon vector illustration with a humorous facial expression, perfect for tropical-themed digital designs, beachy artwork, and lighthearted graphic projects. Scalable and
Seamless vector pattern featuring paper airplanes and stars, designed with a playful children’s theme.
A Cute cloud with smiling face and lightning bolt below, representing playful stormy theme
A playful vector pattern featuring watches, hammers, and mustaches, ideal for a quirky design or fabric print.
A seamless vector pattern featuring cartoon-style hammers and mustaches on a white background. The hammers are brown with a wooden handle, and the mustaches are black with a curly design.
Flat Vector Illustration of Seamless Pattern Featuring Unicorns, Rainbows, Stars, and Hearts. Playful Composition in Pink and Red Tones. Decorative Design for Kids and Fantasy 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
Adorable cartoon bear holding a big orange heart with floating hearts above. Perfect for Valentines Day, love, and friendship themes. Cute Bear Holding Heart with Love
illustration of a cheerful, vibrant-colored Sloth, perfect for a children's theme
Playful Blue Jellyfish Character Illustration
Delicate transparent balloons floating upwards, perfect for party themes, celebration designs, or whimsical event visuals. Ideal for invitations, decorations, or lighthearted branding.
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
A playful cartoon character making a silly face and gesture, perfect for fun and lighthearted themes
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
Fun love-themed stickers featuring hearts, gifts, and sweet treats
Vector illustration of a funny stele with eyes in a children's cartoon style, perfect for fairy tale-themed designs.
Food Icon Set with Mustard, Cheese, and Avocado
Seamless vector pattern featuring adorable cartoon sheep wearing Santa hats and festive holly sprigs, perfect for Christmas-themed designs and winter celebrations.
Seamless Pattern of Mermaids with Crowns, Seashells, Starfish, Fish, and Seaweed. Playful Marine Theme on Light Background. Decorative Design for Kids and Fantasy Stories. Flat Vector Illustration
Seamless Pattern Featuring Unicorn Heads, Crowns, and Hearts. Pink and Red Color Palette on Light Background. Decorative Design for Kids and Fantasy Themes. Flat Vector Illustration
Cute koala riding ufo cartoon
This vector presents a delightful black frog emoji, illustrated with a minimalist approach against a white backdrop.
Flat Vector Illustration of Seamless Pattern Featuring Red Dragons with Spiked Backs and Long Tails. Stars Scattered Across Light Background. Repeating Decorative Design for Kids and Fantasy Themes.
A cheerful cartoon man with raised arms, expressing joy and celebration. Perfect for themes of happiness and positivity
Certified April Fools' Day T-Shirt Design - "Laugh Out Loud Guaranteed!"
Ice Cream Cartoon T-shirt Design with Fun, Colorful, and Playful Graphics
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.
Flat Vector Illustration of Seamless Pattern Featuring Pink Dragons with Red Spines and Hearts. Repeating Design on Light Background. Decorative Composition for Kids and Fairytale Themes
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.
A vibrant scattering of stylized rainbow flowers creates a lighthearted and colorful pattern against a stark white background, suggesting themes of nature, happiness, and joyful springtime bloom
Hand drawn seamless pattern of fried eggs on a white background featuring multiple egg shapes and yolks
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Illustration of a man with magnifying glass

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