Vine Track/Vine Cart

Vine cart/track are plants which could be used like normal cart and track, but they can be planted by the player. Each of them needs only a half of a seed slot, so they count as one plant.

Trivia

 * The player can't use plant food on them.
 * Unlike the normal cart and track, there could be multiple carts on a connected track.
 * Their name is a pun of Mine-cart track.