How the internet works is explained using the example of pigeons in their nests. All the pigeons, or computers, are connected together - this is called a network. The rules of how the messages are sent are called protocols and large messages are broken into small parts called packets. All of the pigeons' nests have a number called an IP address and they can be found on a domain name server, which is like a computer address book. The routers send the message to the computer (the pigeon).
In a large space, children could demonstrate how the internet works in a similar way to the pigeons in the clip. The children could have different roles - computers, connectors (by holding hands), routers, a domain name server and packets. Each child could wear a sign which says what they are and they could be asked questions about their role.