My girlfriend just got a hamster....the cage is plenty big (slighly smaller than the recommended 19 x 19, but it has a place for it to climb to another level, so he has plenty of room), he's got plenty of food, water, proper bedding, treats, etc. However, all he does is stay in his little house thing and does not come out to play. The only times he has come out is for food and water. He has yet to play on his wheel or anything like that. Is this normal with a new hamster and will it take a few days for him to be more social? My girlfriend was wanting one for awhile, so she's a little disappointed right now

Any help or advice you folks can give is appreciated!