TNT

TNT is an explosive block that can be lit by a redstone signal, flint and steel, stray fire, flaming projectile or explosion.

When lit, TNT becomes primed TNT, a gravity-affected entity that produces a damaging, block-destroying explosion, usually after four seconds. Blocks destroyed by TNT always drop their usual items as if mined by a player.

TNT can be broken instantly with any tool or by hand. Primed TNT cannot be broken as it is an entity, but it can be removed with the /kill command.