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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Charming illustration featuring a kitchen-themed poster with a disco ball and playful lettering. Perfect for adding fun and creativity to any cooking space or home decor
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Bright floral and egg pattern design for spring celebration or decoration
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.
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
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
Happy easter card with colorful eggs and bunny design.
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.
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.
Bright and playful April 1 text on a light blue cloud shape, perfect for April Fools Day themes and celebrations.
Illustration of red heart-shaped balloons floating with fluffy white clouds against a bright blue sky, conveying themes of love, romance, celebration, and happiness for whimsical, cheerful occasions
Colorful turquoise balloons with flowing strings create a festive background pattern
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.
A seamless pattern featuring adorable kawaii tiger cubs. The vibrant colors and charming designs make this illustration perfect for fabric, wallpapers, and childrens products.
Hand drawn seamless sunny pattern with yellow happy faces. A fun and lighthearted background perfect for nursery rooms, stationery, wallpapers, and childrens summer themes
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
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 books, perfect for a kid school or education theme
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
A delightful seamless pattern featuring cheerful cartoon bananas on a vibrant blue backdrop, conveying a playful and lighthearted theme suitable for fun designs.
illustration of a cheerful, vibrant-colored owl, perfect for a children's theme
illustration of a cheerful, vibrant-colored duck, perfect for a children or kid theme
vector illustration of an adorable cartoon goldfish
image captures the essence of fall with a playful twist. A variety of autumn leaves in warm shades of yellow, orange, green, and red overlap each other creating a rich tapestry of seasonal colors.
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.
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
illustration of a cheerful, vibrant-colored chicken, perfect for a children's theme
Hilarious Chicken Jockey Design With Stacked Repeat Font - Perfect For Gamers And Meme Lovers Who Appreciate Quirky Humor. Great Conversation Starter And Gift For Funny Geeks And Gaming Fans.
illustration of a cheerful, vibrant-colored fish, perfect for a children's theme
minimalist teddy bear outline illustration with smiling face and waving gesture, perfect for children's creative themes on white background
illustration of a cheerful, vibrant-colored monkey, perfect for a children's theme
This whimsical illustration features a charming raccoon holding a lemon with the humorous quote: "In the interest of full transparency, it was not easy peasy lemon squeezy." Perfect for quirky designs
Charming retro style floral pattern with simple blossoms and leaves on a teal background
Colorful Triangle Bunting Garlands on a Black Background.
illustration of a vibrant-colored Giraffe, perfect for a children or kid theme
Squash Your Goals. Features playful pumpkin characters with whimsical details. Retro illustration style with hand-drawn lettering pumpkin themed pun. Warm yellow, green, and orange color palette.
Graffiti tag “Mood On” street art urban for World Emoji Day, colorful mural full of fun and expressive vibes.
Colorful cartoon birds are joyfully dancing across a clean white background. The playful characters delight the viewer with their whimsical and cheerful expressions, perfect for children's decor.
illustration of a cheerful, vibrant-colored cow, perfect for a children's theme
Whimsical hand drawn line art of crab featuring distinct spots and claws, playful design. The crab appears poised, reflecting a lighthearted sea theme. Vector outline illustration
Watercolor seamless pattern background featuring cute green creature with butterfly, tropical leaves, and flowers, perfect for wallpaper design
A cute cartoon watermelon slice stands with wide eyes and raised arms, conveying surprise and a touch of worry. Perfect for fun, food-themed projects!
illustration of a cheerful, vibrant-colored Chameleon, perfect for a children's theme
Bright pink balloon floating on a thin black string in a minimalist design
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
Minimalist design of round black glasses paired with a red clown nose, highlighting humorous and playful themes.
Person holding a love heart balloon cheerful expression. Celebration and happiness concept vector illustration.
A skeleton holding a frisbee is a playful and quirky illustration suitable for Halloween-themed designs, sports events graphics, or any fun, lighthearted projects.
A simple yet eye-catching illustration featuring stickman characters with yellow heads, accompanied by the text "Where are U?" in vibrant colors. This image represents a sense of searching or calling
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Illustration of a man with magnifying glass

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