Conectar 3 arduinos a un pc

Quiero conectar 3 arduinos(los 3 entre si) con un pc y poder mandar mensajes desde un arduino a otro.

You need a hub to connect the three Arduino USB ports to your PC.

You need an application on the PC to interpret serial data form one USB port and send it to another. This can be done using various programming languages.

And you need to explain why you want to do this.