To use these Real Littles journals, simply unlock them with the provided key. Kids can then start writing their secrets or stories on the 50 printed pages. When you get a new journal, be sure to check the cover first to find the secret hint, and then open it to discover the micro - surprises inside. As for maintenance, keep the journal away from water to avoid damaging the pages and the lock. Also, don't force the lock too hard to prevent it from breaking. Enjoy collecting all 6 themes!