The Jack-in-the-box is an item used by Jack-in-the-Box Zombies. It can be attracted by a Magnet-shroom. If it or the zombie is not taken out within a certain amount of time, it will explode and destroy all plants in a 3x3 range, similar to a Cherry Bomb's explosion or a Cob Cannon's missiles, along with the Jack-in-the-Box Zombie carrying it.
Jack-in-the-boxes are carried by Jack-in-the-Box Zombies. As long as its carrier is alive, the jack-in-the-box generates a special melody, a xylophone version of the famous nursery tune "Pop Goes the Weasel." If it is not pulled by a Magnet-shroom (or either the Jack-in-the-Box Zombie is not killed), it detonates after a while, killing all the plants in a 3x3 range of it along with its carrier. It scares its carrier by surprising it at a random time, triggering the sudden explosion.
- For more strategies, see Jack-in-the-Box Zombie.
Since it is magnetic, it is usually best to use Magnet-shroom to attract it away from its owner. However, if you have a very powerful offensive strategy, you can just count on your offense to kill them. Instant-kill plants such as Cherry Bomb, Jalapeno, and Squash also works.
- Even though the jack-in-the-box is modeled after a kid's toy, it explodes in the game.
- When it explodes, it makes a "Sproing!!" sound, just like the Umbrella Leaf.