Just find a NORMAL tree.
After you find a tree, make a 2 block deep, 5X5 hole under it.
Then you put a lever under the stump of the tree, and turn it on. Also put Redstone under it.
After you do that put any block around the Redstone (And break the corners off), then put Redstone torches on the blocks.
NOW TIME FOR THE FUNNEST PART- ADDING TNT!