Background: The limited number of web and child applications becomes a challenge especially providing web or education app that can be a source of information referral to help the school task, especially for the needs of children in Indonesia. Objective: This study answers the challenge by designing a special encyclopedia for children called Anapedia, an open web-based encyclopedia for children. Methods: Anapedia designed for the quality of content for education and design for entertainment that is suitable for children's needs by considering the children cognitive abilities. Results: The features are full-color, simple layout, large font sizes, and simple language with illustrated drawing to make it easier. For maintain the quality of the articles, this app involves the educator as a contributor who have better understand the characteristic and need of school-level children. This also provided a search feature based on keywords using information retrieval system with spell checker. Conclusion: The results of testing result with Black Box Method, it can be concluded that the entire system being tested has been functioning properly in accordance with expectations.