This is a super duper easy cannon for Minecraft PE
You will need:
• Bucket of water
• Flint and steel
NO redstone needed
Step 1: Make a "U" Shape
Step 2: Dig and Place 2 Obsidian Blocks in Front
Step 3: Fill in the Digged Hole With Obsidian
Step 4: Add a Ladder
Step 5: Place TNT
Make sure u leave one space in between as shown in the picture!!
Step 6: Put Water in the Hole
Step 7: EXPLODE
Explode both TNTs at the SAME TIME!
If you want farther explosions make a longer cannon!
Make sure you: