What are some hidden elements that are related to vehicles in Little Alchemy 2?

In Little Alchemy 2, there are several hidden elements related to vehicles that can be discovered through specific combinations. Here are some of the key vehicle-related hidden elements and how to create them:

1. Car
- Combination: Wheel + Metal
- Steps:
1. Create Wheel by combining Stone + Tool.
2. Create Metal by combining Fire + Stone.
3. Combine Wheel + Metal to create a Car.

2. Bicycle
- Combination: Wheel + Wheel
- Steps:
1. Create Wheel by combining Stone + Tool.
2. Combine Wheel + Wheel to create a Bicycle.

3. Motorcycle
- Combination: Bicycle + Engine
- Steps:
1. Create Bicycle by combining Wheel + Wheel.
2. Create Engine by combining Metal + Machine.
3. Combine Bicycle + Engine to create a Motorcycle.

4. Truck
- Combination: Car + Big
- Steps:
1. Create Car by combining Wheel + Metal.
2. Create Big by combining Philosophy + Planet (or Philosophy + Galaxy).
3. Combine Car + Big to create a Truck.

5. Train
- Combination: Steam Engine + Wagon
- Steps:
1. Create Steam Engine by combining Boiler + Wheel.
2. Create Wagon by combining Wood + Wheel.
3. Combine Steam Engine + Wagon to create a Train.

6. Airplane
- Combination: Bird + Metal
- Steps:
1. Create Bird by combining Egg + Air.
2. Create Metal by combining Fire + Stone.
3. Combine Bird + Metal to create an Airplane.

7. Rocket
- Combination: Airplane + Space
- Steps:
1. Create Airplane by combining Bird + Metal.
2. Create Space by combining Sky + Star.
3. Combine Airplane + Space to create a Rocket.

8. Boat
- Combination: Water + Wood
- Steps:
1. Create Water by combining Rain + Earth (or Fire + Ice).
2. Create Wood by combining Tree + Tool.
3. Combine Water + Wood to create a Boat.

9. Submarine
- Combination: Boat + Metal
- Steps:
1. Create Boat by combining Water + Wood.
2. Create Metal by combining Fire + Stone.
3. Combine Boat + Metal to create a Submarine.

10. Sailboat
- Combination: Boat + Wind
- Steps:
1. Create Boat by combining Water + Wood.
2. Create Wind by combining Air + Pressure.
3. Combine Boat + Wind to create a Sailboat.

These combinations will help you unlock vehicle-related hidden elements in Little Alchemy 2. Experiment with these steps to expand your collection and discover more hidden content!