@YogurtMan4 How? if you remove a block the ladder would break and you can only place ladders on whole blocks. Plus barrier blocks are only available via commands. Unless of course your that guy who spawns in all the things he needs and wants then turns on mobs. XD
There's a way to make floatie floats, go into the snapshot, place slime blocks, place ladders on slime blocks, switch to a version of mc that does not have slime blocks, open the world, FLOATIE FLOATS!!!!!!!!!!!!