This project (2016-2019) is a free-of-charge application for multilingual children from the age of five. It helps children develop their vocabulary and practice reading and writing. Children who use one language at home and another in school frequently suffer from gaps in their vocabulary in both of those languages. Although they usually get acquainted with the new language quickly, it is often at the expense of their native tongue. This app aims to help bridge these gaps, while also providing users with new knowledge in an interesting and fun way. For example, it contains interesting bilingual texts about topics the children will have come in contact with at school. This way, the child progresses and expands their vocabulary in both languages at the same time. The app also helps monolingual children who are learning a foreign language and would like to improve their reading comprehension capacities. A website with useful information is also being prepared for the parents and teachers of multilingual children.