Yes, having two can be a riot. Mine play that way, and sometimes they play hide and seek. One will hide behind the couch, while the other looks all over. The one hiding will peek out to see what the other is doing. Then when the other finds him, they chase each other around the house, growling and barking. We fall down laughing at their antics.
Baxter weighed 4.5 lbs at 16 weeks. He's now almost 2 and weighs 12 lbs. (he's not overweight). Snickers weighed 4 lbs at 16 weeks, and he's 2 1/2 and now weighs 9 lbs.