This is a simple thing anyone from new to old users can use.
Step 1: Supplies Needed
To start the fun of the super trampolinte that works on any platform of Minecraft. You will need 25 of any block. (I prefer to use dirt in survival). 23 pieces of Redstone. 1 lever. a bunch of buckets full of water and for 1 use 16 pieces of tnt. of for a lot of uses a BUTTLOAD of TnT
Step 2: The Base of the Project
you will need a area of 49 blocks sqaure. or 7*7
Step 3: Building Layer 1
as you see in the photo of the last step have a foundation of 7*7 then add one block on each up. then completely fill wit water on ever single block on the inside. it doesn't matter what type of block you use. 24 blocks and 25 buckets of water.
Step 4: Next to Last Step
put Redstone on almost every block and put a lever in the middle of one of the sides.
Step 5: Final Step
put your last block in the center of the trampoline. and put tnt along the wall don't worry nothing will blow up that's why the waters there.
Step 6: Have Fun
stand on the block in the center and flip the switch (note you can't be flying) but you will go flying so get a lot of tnt and have continuous fun.