spawnit

// child.js
console.log('child was created with PID: ' + process.pid);

process.on('exit', function(code,signal) {
  console.warn('child is exiting with code: '+ code +' and signal: '+signal)
});

process.on('message', function(data) {
  console.log('child: got message from parent: ' + data);
  process.send('hi, thanks for the message!');
});

// fork.js
var fork = require('child_process').fork,
    child = fork(__dirname + '/child.js');

child.on('message', function(data) {
  console.log('parent: got message from child: ' + data);
});

child.send('hello from your parent');

// server.js
function format(type, output) {
  console.log('child says (' + type + '): ' + output);
}

var spawn = require('child_process').spawn,
    child = spawn('node',['child.js']);

child.stdout.on('data', format.bind(global,'stdout'));
child.stderr.on('data', format.bind(global,'stderr'));