You can get a command block in your Minecraft Java or Bedrock world using cheats and a special chat command.

The TNT block in Minecraft does what it claims, that is, create an explosion. It is especially useful in battle and combats the opponent, but it can be used to prank a friend. To make TNT in Minecraft ...

You can play Minecraft solo, but it's much more fun with friends. Here's how to play multiplayer in Minecraft: Java Edition.