Trampoline
This is a cool minecraft pe trampoline! If you like it then please follow for more!
Bedrock
First place bedrock on a 4x4 ground. Then place bedrock around it. Next put water in the 4 corners.
TNT
Now place TNT. 2 peices on all four sides like the picture above.
Let It Blow!
Place a piece of TNT on the bedrock and light it. You will go flying in the air!