21th Birthday Cards

Celebrate the monumental leap into adulthood with our AI-curated 21st birthday cards. Merging cutting-edge technology with artistic flair, each card distinctively honors this significant coming-of-age. Explore our exclusive assortment, each designed to echo the lively essence and personal journey of the newly minted adult in the modern world.

Global DeliveryPersonalisableeCard(s)

A charming illustration featuring a group of adorable kittens playing with balls of yarn that form the number '21th'. They are on a soft blanket with a festive background of balloons and streamers. Above them floats the cheerful message 'Happy Birthday' in bubbled lettering.
Generated with these themes: 21th  .
Made with ❤️ by AI.

A charming illustration featuring a group of ...

A charming illustration featuring a group of ...

A whimsical drawing of a pastel-colored birthday cake with three layers, each adorned with playful designs and the number '21th' stylishly written on the top. The cake is surrounded by confetti and cute cartoon animals wearing party hats. Above the scene, 'Happy Birthday' is spelled out in balloon letters.
Generated with these themes: 21th  .
Made with ❤️ by AI.

A whimsical drawing of a pastel-colored birth...

A whimsical drawing of a pastel-colored birth...

An endearing illustration showcasing a cuddly bear holding a bouquet of balloons, with the balloons shaped into '21th'. The bear is seated at a picnic setup with a small birthday cake and gifts, all under a banner that reads 'Happy Birthday' in a playful font.
Generated with these themes: 21th  .
Made with ❤️ by AI.

An endearing illustration showcasing a cuddly...

An endearing illustration showcasing a cuddly...

A delightful scene depicting a magical unicorn with a flowing mane, standing beside a rainbow that arches into the number '21th'. Twinkling stars and fluffy clouds fill the background, and above the unicorn, the phrase 'Happy Birthday' glimmers in sparkly, scripted text.
Generated with these themes: 21th  .
Made with ❤️ by AI.

A delightful scene depicting a magical unicor...

A delightful scene depicting a magical unicor...



People love us

See why over 10,000 cards were made in the last two weeks

What a breath of fresh air! Silly Robot Cards have bypassed any card manufacturer with their AI technology and card design(s) to capture the imagination and provide a platform to help produce truly personalised greetings cards. Not only that, there’s also human interaction with REAL people to respond to queries & requests providing real time help, assistance and support. A BIG high five to Silly Robots! 🙌 🤖

Hayley Quince - What a breath of fresh air!

Cool use of AI ... I think maybe Moonpig's days are numbered

Andy Baptist - Cool use of AI ..

I love this concept. My boyfriend made me a card which I loved. The quality was great too. I have now sent Christmas cards to all my loved ones, I can't wait for them to receive them.

Chiara - The cutest personalised cards

Really creative and original - like that it’s gives you multiple options

Gail Flower - Really creative and original

Frequently Asked Questions


How much does it cost?

It costs £3.99 to print a card.

Cards are printed on Glossy card and supplied with a paper envelope and a protective biodegradable OPP bag.

How long does it take for a card to arrive?

It takes 24-48 hours for a card to be printed and shipped.

Shipping options for the UK are as follows:

OptionCourierPrice
BudgetRoyal Mail 48£1.50
StandardRoyal Mail 24£1.95
ExpressRoyal Mail Tracked 24£6.24
OvernightDPD Local Next Day£9.95

International shipping is also available.

What size is the card?

5.5 x 5.5 inches (140 x 140mm)

Can I personalise the card?

Yes, you can write a message on the inside of the card.

How do I send a card?

After generating your cards you can print a card to any address worldwide.

What quality is the card?

The card is a glossy card.

Supplied with a paper envelope and a protective biodegradable OPP bag.

What happens to my pictures after uploading?

All uploaded pictures are deleted within 30 days.

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Environmental Impact

See how we're reducing our impact on the environment


Water-based inks icon

Water-based inks

Printed using water based inks.

Sustainabily sourced icon

Sustainably sourced paper or wood

From sustainable forests.

Vegan-friendly icon

Vegan-friendly

Contains no animal products.

Recyclable

Can be recycled.



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