Mitchell's children are looking forward to unlimited supply of yogurt and tofu and a basement perfect for biking and rollerskating, the professor says.
Forsgard says Anneke is "just a very sweet little girl who is just starting to walk." The twins, Mitchell says, are "like night and day."
While Katrina is talkative, he says, "Erik is pretty much a 'yup, nope' kind of guy."
Aside from Legos, Erik's penchants include ships and Vikings, his father and mother say. Mitchell admits that he has had a bit of influence on his son's choice of toys. And Katrina's interests, according to her parents, lie more along the lines of sports and ponies.
"They're really interested in living in the house now," Forsgard says. "Both of them are very much into sports. They're going to be able to go to intramurals...they'll be great cheerleaders."
Johannes K. Juette contributed to the reporting of this article.