Head over to the Mystery Shop in Pet Society and you’ll find a new Mystery Egg machine that has been released in the game. The machine here is a Doll’s House machine and it promises a “different room or doll” will be found “in every egg.”
Each egg costs 600 coins each, but according to Playfish, the Doll’s House rooms come decorated with beautiful items, making them worth the cost.
As of this writing, there has been no word made as to exactly how many rooms you’ll need to find to complete the Doll’s House, or how many eggs there are in general (the totals would be different due to their being dolls in the eggs as well).
To take your chance at finding something special in one of these eggs, head over to the game’s page on Facebook.