Here is a guide of how to build a cool water slide in minecraft .Best to do in creative
step 1. Begin by finding a relatively flat area next to water. Build a a platform with wooden planks right above the edge of the water. Make sure that the water is at least 3 blocks deep and check that there’s nothing for the boat to crash in to now build the first few steps with side walls.
step 2. continue to build more steps,each 3 blocks wide excluding the walls. you can save on building blocks by leaving out the outside lower corners of each step don’t leave any holes in your slide or you boat will fall down them.
step 3. 20 steps is good for a fun ride but you can keep going if you really want to.Now build a wide platform on top and place safety fences around the edge.this may be a good time to have a snack at the top of your ride you did bring a snack didn’t you???????
step 4. The water slide is looking bland let’s make it cooler by putting stone slabs and torches on the top of each side. Dot his for every step top to bottom. Depending on where you slide is you could add other blocks to match it’s surroundings.
step 5. Pour 3 buckets of water on the 3 rear blocks of the highest point. The water should flow all the way to the bottom. Then cut a hole in platform floor and drop a gravel block through. This will mark where your ladder will be.
step 6. Standing on the gravel facing the slide place 2 wooden planks in front of you and hop into them . Jump up and place another one under you feet and continue this until you reach the top of the platform. Finally place ladders on the column and install a trapdoor over the hole.
step 7. Now for the fun bit Place a boat on the waterslide and hop in! For best of results put the boat middle of the slide and let gravity do the rest and why not try a night run the slide would look lovely with all torches but do watch out for crepper they do love waterslides.
TOM!!!