Stichting Kinderpostzegels is a Dutch organization working to support the development of vulnerable children all over the world. Each year, more than 150,000 kids from 4,000 schools and 8,000 school classes go door-to-door, selling stamps and products to help other children. With our new app, the yearly campaign is easier and more fun than ever before.

In 2017, aFrogleap joined the digital transformation of Stichting Kinderpostzegels as a strategic, creative, and development partner. Together, we did a Design Sprint to explore how we could make the sales process more fun for kids and easier for buyers at the door. We tested a prototype app with young smartphone users, and we received feedback full of curiosity and enthusiasm. Using the insights from the Design Sprint, we started working on the full app.


The new Kinderpostzegels app for Android and iOS offers a playful and friendly experience to everyone who’s participating. Inside the app, kids can unlock special badges when they sell products. Placing an order is also much easier with the app, as children will no longer have to use paper forms. Another benefit: if you’re buying Kinderpostzegels at the door, you can now safely pay with iDeal.

We’re glad our app will let thousands of kids experience fundraising in a new, exciting way. By going digital, Kinderpostzegels has made a great step forward.

“We chose to work with aFrogleap because of their knowledge, expertise, and demonstrated track record. Both aFrogleap’s vision of the future and their knowledge and experience in app development contributed to our decision. And last but not least: their pleasant and pro-active communication style.”
Hans Vermathen, Innovation & Process Improvement Manager at Kinderpostzegels

The client
Stichting Kinderpostzegels Nederland

Android & iOS

The challenge

  • Help Kinderpostzegels with its digital transformation
  • Create an app that’s easy enough for kids to use
  • Make the Kinderpostzegels campaign more fun to participate in

The product

  • The app motivates children to sell more products by letting them unlock special badges
  • The app supports a range of different payment options, including iDeal
  • The app even works without mobile data, sending out orders once the kids are back on WiFi