Flat Design Brainstorm

1. Objects

1.1. Transportation

1.1.1. Cars

1.1.2. Planes

1.1.3. Trains

1.2. Buildings

1.2.1. Skyscrapers

1.2.2. Schools

1.2.3. Landmarks

1.3. Electronics

1.3.1. Computer

1.3.2. Game Console

1.3.3. Phone

2. Themes

2.1. Warfare

2.2. Fantasy

2.3. Sci-Fi

3. People

3.1. Students

3.2. Workers

3.3. Visionaries

4. Landscapes

4.1. Cities

4.1.1. Skylines

4.1.2. Highways

4.1.3. Airports

4.2. Countryside

4.2.1. Hills

4.2.2. Farms

4.2.3. Towns

4.3. Space

4.3.1. Exo-planets

4.3.2. Stars

4.3.3. Comets