hi. i am making a social media app. it is like reddit, but it can be self-hosted and users can select a theme for their instance. I want one theme to be a cave theme. 404 pages, empty data pages and profile pages will be decorated with fantasy cave illustrations - glowing crystals, lanterns, etc. Each user profile has a gallery section where they can put objects, either purchased with karma or received as gifts by other users. Brainstorm some ideas of objects that users can be given as gifts. (This is partly inspired by Neopets, so this can be a little bit whimsical.)