Yes, you can make your villagers float!
But, first you need to identify the floating villagers.
**The villager below is NOT, I repeat NOT jumping up and down.**
Unable to tell the difference?
Just look at the White "Ring" that your villager is standing on. You can also look at the shadow, but it is harder to see the shadow.
Let's look at the same picture again, this time it will be marked with a red arrow.
Now, you can identify the floating villagers. Now for the exciting part, making your own villagers float.
You need two villagers, Children and Nursing Mother doesn't work. (Sorry kid, but you need to wait until you're older)
Now, you need to make the villager jump. But how on Isola, can you get your villager to jump?
Well, you place you villager in place shown in picture below.
Your villager's Action should be now "Enjoying Bath" (You can actually do this part, when the bath is not repaired)
When the villager is about to jump in the bath. Press SPACE Bar to pause the game. The villager should be up in the air, when you pause the game.
Now, you need to distract the villager from landing into the water.To do that, place the second villager on the first one, as shown in this picture.
This is important, the second villager must interact with the first one (By Embracing her, or Telling a Story to her in my case) It can take many tries, you may need start it over again.
Now, unpause the game.
The first villager is distracted by the second villager, because he is telling a story to her. So she replace "Going to Bath" with "Listening to a Story" and run to Amphitheater, but she is up in the air, so she float to there instead, as shown in the picture below.