Remove a block. Carefully take one block out from any level of the tower except the top. Look for the block that is the loosest, or the easiest to remove, or that will least disturb the stability of the tower. You can push the block or pull the block, depending on the angle and the location in the stack.
Remember: you can only touch the tower with one hand a time. This rule keeps players from holding the tower steady while they pull their blocks.[3]