I let my small cousin play Minecraft a while, but then she came to me with a problem: She had made a new survival world which consisted only of a sea, using the superflat world prefixes. She said she likes the world and doesn't want to make a new one or fill up the water.
How can I build on an infinite sea using at most the
/give command? What items will I need to use? (any offered solution will be appreciated).