Time Machine

The  is a mini-game in FarmVille released on October 12th, 2012. You need 5 Time Tonic to be able to travel in some era and get 1 of 5 possible rewards. When you get unlock key to unlock next era. You can ask for Time Tonic via wall post fed every 4 hours. There is 3 different eras and total 15 different rewards.

The 1970s
In The 1970s rewards are Studio 45 Gnome, Peace Flower Crop, Lava Lamp Tree, Hustlin Cow and Hippie Horse. When you get Flax Capacitor you will unlock Victorian Era.

Victorian Era
In Victorian Era rewards are Duchess Gnome, Ivy, Parasol Tree, Queen Victorias Dog and Buckingham Horse. When you get Gyroskope you will unlock Feudal Japan.

Feudal Japan
In Feudal Japan reward are Geisha Gnome, Cherry Blossom, Ume Tree, Nunchaku Turtle and Warrior Horse.