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

In Little Alchemy 2, personal transportation-related hidden elements can be unlocked through specific combinations. Here are some steps to discover these elements:

1. Bicycle:
- Combine Wheel + Wheel to create a Bicycle.
- Alternatively, combine Wheel + Metal to get a Bicycle.

2. Car:
- Combine Wheel + Wheel + Metal to create a Car.
- Alternatively, combine Wheel + Wheel + House to get a Car.

3. Motorcycle:
- Combine Bicycle + Motor to create a Motorcycle.
- Alternatively, combine Bicycle + Engine to get a Motorcycle.

4. Bus:
- Combine Car + Car to create a Bus.
- Alternatively, combine Car + Big to get a Bus.

5. Truck:
- Combine Car + Big to create a Truck.
- Alternatively, combine Car + Metal to get a Truck.

6. Train:
- Combine Metal + Wheel + Wheel to create a Train.
- Alternatively, combine Metal + Cart to get a Train.

7. Airplane:
- Combine Bird + Metal to create an Airplane.
- Alternatively, combine Bird + Steel to get an Airplane.

8. Helicopter:
- Combine Airplane + Blade to create a Helicopter.
- Alternatively, combine Blade + Metal to get a Helicopter.

9. Rocket:
- Combine Metal + Fire to create a Rocket.
- Alternatively, combine Metal + Explosion to get a Rocket.

10. Submarine:
- Combine Boat + Metal to create a Submarine.
- Alternatively, combine Boat + Steel to get a Submarine.

These combinations should help you unlock various personal transportation-related hidden elements in Little Alchemy 2. Experiment with these steps to expand your collection and discover more elements!