When riding in a cab in Singapore, you have a variety of transportation options:

1. The cab can hold four adults.
2. The cab can hold three adults and two children.
3. The cab can hold two adults and three children.
4. The cab can hold one adult and four children.
5. Or, you can just cram all six of your kids in the cab and send them on their merry way.  Just make sure one of the kids has some cash.