well i have a nice stable for my horses , here's some pictures
and a little water fountain
now the answer to the question is this:
1. get a button or lever
2. put it where i did on the pic
3. and then go stand on the crafting table and push the button
and here is what happens after:
you will fall into that water and land safely 
and a little water fountain
now the answer to the question is this:1. get a button or lever
2. put it where i did on the pic
3. and then go stand on the crafting table and push the buttonand here is what happens after:
you will fall into that water and land safely 