He watched what Laura did, then copied her before speaking into the thingy. Then he held Alex up to it and helped him growl into it so everyone would know he was there too.
And then people started replying! Jake giggled a bit before replying to a lady called Izzy. After that, he tucked Alex in under his arm and then reached for Laura's hand so they could go out of the dark room. "Are these people your friends?" he asked as more people replied to him.