I'm convinced Greta's a secret genius. Philippa's been counting for a while, and if you start to count, especially in German but sometimes in English too, she'll try to finish and usually gets it pretty right. But Greta, no, Greta's too good for that. Who needs to know how to count correctly to 10 when you can stand outside, facing a wall with no one around you, and scream "zwei! vier! 2! 4! 2! 4!" over and over. And then she just continues on with her business as usual.