The Creeper Cube

Step 1: TNT

Make a 6x6x6 tnt cube

Step 2: Face

When chosen a front, put the creeper face with black wool.

Step 3: Front of Face

Using light green wool cover the tnt on the front

Step 4: Cover All

Cover all the tnt in light green wool except one block on the top

Step 5: BOOM

When ready light the tnt on the one block you didn't cover.