Smiling young Letters to Isabel club member

A pediatric cancer community, but we call it a club.

We've built the best pen pal club for pediatric cancer fighters, survivors, and guardians. Your new pen pal is just a few steps away!

Join the Club See How It Works

Every year, 16,000 kids are diagnosed with cancer in the United States.

There is currently no system that connects pediatric cancer patients and families one-to-one, leaving kids and guardians feeling confused, fearful, and alone.

Until now.

Hi, we're Letters to Isabel!

Designed for kids and their guardians, we help every child find a friend who truly understands what it's like to have cancer. Through thoughtful matching, online messaging, and handwritten letters, we're creating friendships that last long after treatment ends.

Pen pals Amelia and Maryam standing together

Meet Amelia & Maryam

What started as a pen pal match became a friendship that helped these two brave girls fight cancer together.

Child in a hospital bed opening a Boombox

Child in the hospital hugging a giant teddy bear mascot

Join the Club

Sign up & tell us about yourself. You decide what information to share so we can best support you through every stage of your cancer diagnosis.

How it works

Create your account
Tell us about yourself, your diagnosis, and what you're looking for in a pen pal.
Get matched
We'll thoughtfully match you with another child or guardian based on age, diagnosis, gender, and location.
Start connecting
Chat in the app, unbox your Boombox, and exchange handwritten letters, with your new pen pal.

Our impact, by the numbers

Behind every number is a child, a friendship, and a story of connection!

Kids with cancer connected: 135+
Boomboxes delivered: 90+
Hospital partners: 10

Our hospital partners

We partner with children's hospitals nationwide, working alongside child life specialists and oncology staff to introduce Letters to Isabel to the patients and families they care for every day.