Wishing you happiness and lots of great moments on your birthday 🎂

- Grace

Sample message image for message from Fin

Happy B-day! 🎂 You make work fun and bring such great ideas to the team. Cheers to YOU!

- Fin

Hope all your birthday wishes come true on this special day. ❤️🎉

- Jane

Make Their 21st Unforgettable with a Group 21st Birthday Card

A 21st birthday deserves a big celebration. Gather messages, photos and videos from everyone in one digital card, and collect for a gift along the way.

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Birthday
- Funny
- - Brother
  - Dad
  - Daughter
  - Grandad
  - Grandma
  - Mom
  - Sister
  - Son
- - Boss
  - Client
  - Colleague
  - Employee
  - Teacher
Christmas
Leaving & Farewell
Congratulations
Thank You
Retirement
Work Anniversary
Get Well Soon
Sympathy
Maternity Leave
Baby Shower
Engagement
Wedding
Anniversary
Good Luck
Graduation
Welcome & Onboarding
New Home

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Classic Officially Vintage Birthday Card

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How to Create a 21st Birthday Thankbox

Create & Customize

Pick a 21st birthday design from our catalog and set up the card in seconds. Personalize the title and background to make it theirs.

Invite Everyone

Share one link with friends, family and coworkers so they can add messages, photos, GIFs and videos. There is no limit on how many people can sign.

Send & Celebrate

Schedule the card to arrive on their 21st birthday, or send it when you are ready. If you added a gift collection, they can redeem it for a digital gift card.

Why Thankbox Is the Best Way to Celebrate a 21st Birthday

A Big Card for a Big Birthday

The 21st is one of the most celebrated birthdays there is. With no limit on messages, everyone from childhood friends to new coworkers can share their favorite memories and wishes.

Party-Ready Messages

Add photos from nights out, funny GIFs and video messages to make the card as lively as the celebration. It is a keepsake they will want to open again and again.

Pool Together for Something Special

A gift collection makes it simple for everyone to chip in when they add their message. The total can be exchanged for a digital gift card, so they can treat themselves to exactly what they want.

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Only pay when you're ready to send it.