sentences:  He has two children, Lena and Kai Weinkauf, who perform spoken word parts on the song "I Am a Paleontologist".Kai sings lead vocals for "Champion of the Spelling Bee", "Together we can Fly", "Ambivalent", "Picky Eaters", "Antithesis", and "A song about Anything".Weinkauf's wife and two children perform several vocal and spoken parts on his solo albums.