Some users of the Basque Wikimedians User Group are working in not-wmf based Vikidia, in order to make content accessible to 8-13 year schoolchildren. This project is at risk now, as funding seems to be finishing, but we are still very interested in it. Some users have suggested the possibility to insert an extra tab in the header (Article, Talk, EXTRA TAB) that would point to the article with a slash (Solar System/KIDS PAGE). This would give some benefits, as the possibility to use the template system of Wikipedia and centralizing the information.
I have done my research, and it seems that there is an extension for this: https://www.mediawiki.org/wiki/Extension:Header_Tabs. Is this extension user for this? Can we implement it in euwp to develop this project?