Beach

1. water

1.1. swiming

1.1.1. dive

1.1.1.1. fish

1.1.1.1.1. take pictures under water

2. sun

2.1. Tan

2.1.1. relax

2.1.1.1. read book

3. sand

3.1. play

3.1.1. sand castle

4. people

4.1. children

4.1.1. joy

5. fresh air

5.1. clear view

5.1.1. clear mind