Open the shit outta it. Jump arouund your house pointing it at walls making little portal gun noises.
Why else would you buy it?
On a related note, me and 2 of my friends were sitting in my house on friday (high and playing Portal 2 coincidentally) when a friend of ours and her boyfriend stopped by. He had a model of the Normandy SV2 that he had only just bought, and so he opened it up and we all had a look at it. The 3 of us who were high thought it was the best thing ever and we started up a conversation about how stupid it is to not open stuff like that.
Long story short, the 5 of us agreed there is virtually no point in leaving things like that unopened unless you plan to sell it again at some point.