What are some tips for discovering transportation-related elements in Little Alchemy 2?

In Little Alchemy 2, discovering transportation-related elements can be both fun and challenging. Here are some tips and specific combinations to help you unlock these elements:

1. Start with Basic Elements:
- Air + Fire = Energy
- Earth + Water = Mud
- Earth + Fire = Lava
- Lava + Air = Stone
- Stone + Air = Sand
- Sand + Fire = Glass

2. Create Basic Vehicles:
- Wheel: Combine Stone + Tool or Wood + Tool.
- Cart: Combine Wheel + Wood.
- Bicycle: Combine Wheel + Wheel.
- Car: Combine Metal + Wheel or Combustion Engine + Cart.
- Train: Combine Metal + Steam Engine or Cart + Cart.
- Airplane: Combine Metal + Bird or Metal + Air.
- Boat: Combine Water + Wood or Water + House.
- Ship: Combine Boat + Boat or Boat + Wood.
- Rocket: Combine Metal + Fire or Metal + Airplane.

3. Advanced Transportation Elements:
- Steam Engine: Combine Metal + Steam (Steam is created by combining Fire + Water).
- Combustion Engine: Combine Metal + Explosion (Explosion is created by combining Fire + Gunpowder or Fire + Dynamite).
- Jet: Combine Airplane + Air or Airplane + Energy.
- Spaceship: Combine Rocket + Astronaut (Astronaut is created by combining Human + Moon or Human + Space).
- Submarine: Combine Boat + Metal or Boat + Glass.
- Helicopter: Combine Airplane + Blade (Blade is created by combining Metal + Wind or Metal + Sword).

4. Experiment with Combinations:
- Human + Vehicle: Many transportation elements can be combined with Human to create new forms of transportation, such as Human + Bicycle = Cyclist or Human + Car = Driver.
- Animal + Vehicle: Some animals can be combined with vehicles to create unique transportation elements, like Horse + Cart = Horse-Drawn Carriage.

5. Use Hints Wisely:
- If you're stuck, use the in-game hint system to get suggestions for new combinations. This can be especially helpful for discovering less obvious transportation-related elements.

6. Think Outside the Box:
- Some transportation elements require thinking beyond the obvious. For example, Time + Train = Time Machine or Magic + Broom = Broomstick.

7. Check for Hidden Elements:
- Some transportation elements are hidden and require specific combinations or sequences. For example, Deity + Car = Chariot or Pirate + Ship = Pirate Ship.

By following these tips and experimenting with different combinations, you should be able to discover a wide range of transportation-related elements in Little Alchemy 2. Happy crafting!