The Cottages talk to House via speaker phone, telling him about Driscoll's heart rate issue. House says that rules out their previous antihistamine toxicity theory, and then reveals where he's talking to them from: the playground. "Great place to meet chicks," he says. While Foreman, Martha, and Taub do their jobs and think of diagnoses, Chase keeps checking his phone. He manages to come up with a diagnosis of his own in between his frequent phone calls, which House already knows the reason for: the mystery profile hacker put up a status update saying he likes fat woman along with his cell phone number. I hope Cameron is doing this. House tells the Cottages to test Driscoll for Chase's theory that I won't bother to mention because it won't work out anyway while he heads in to no doubt cause trouble at Waldenwood Preschool.
He lies to the woman in charge to get into the admission test playroom, telling her that he has to check the area for toxins after a child got sick not soon after getting home from the school. Of course, the teacher is now terribly worried, both for the sake of the non-existent sick kid and the rest of the staff and kids at the school, but also that Waldenwood is going to get sued. House refuses to tell her the identity of the sick kid, claiming doctor-patient confidentiality, then asks if they're in the room where all the admissions tests occur. Teacher says yes, and then wonders if they should get rid of all the toys in case they're toxic. House quickly assures her that isn't necessary, and that, in fact, she should probably just stay away from the toys, the room, and House, in order to minimize any possible exposure. She leaves, and he gets to work taking pictures of every toy in the room.