{"message":"Welcome to Kid Knowledge API","version":"2.0.0","endpoints":{"categories":"/api/categories","subcategories":"/api/subcategories/:parentId","knowledge":"/api/knowledge","knowledgeByCategory":"/api/knowledge/category/:categoryId","quiz":"/api/quiz/:storyId","userProgress":"/api/user/:userId/progress","achievements":"/api/achievements","avatars":"/api/avatars"}}