When I brought Amy home I took a quick photo of her in the box then tried to video her climbing out of the box into her new home! The video wasn't that good - I didn't want to scare her so I took it from a distance.
After a couple of pics, leave him alone and allow him to settle in and get used to his new cage and surroundings. As already said, he will probably be very thirsty. Don't worry if he doesn't eat straight away - it can take a couple of days for them to settle and feel comfortable. Enjoy the moment - they don't stay that small for very long!