What is it with the funny names?

My children, in their brilliance, really have chosen creative names for their pet objects and animals. As we all know, Melissa at 7 named her white cockatiel "White Lump". Anthony was a tad less creative with his favorite pet named "Bird" (yes, it was a bird), however he did name a large train track he constructed when he was four, they were his "convisements". Following in this unspoken tradition, Nikolai has named two of his (actually Anthony's, but he loves them so much he just might adopt them) cars. One is hot pink and orange, and its name is "Egg Burp". The other one, a nice little yellow car with a sweet disposition in spite of its chronic halitosis, is named "Fenninnime". I shudder to think of the possibilities for my grandchildren's names...