I need to pick a musical work from a music genre, and I want to use a children's song. I think I want to use "The Wheels on the Bus" or "Conjunction, Junction, What's Your Function." The genre I would select for these two songs is educational genre; however, I do not know if the educational genre is a true genre. I read "The Wheels on the Bus" as children's folk music, but I do know if that counts as a genre. If it is children's folk, how do I describe the features of children's folk?

Children's music is something of its own genre; however, whichever song you choose will fit into a different musical genre as well. For instance, "Conjunction Junction," being from "School House Rock," is more of a slow rock song, while "The Wheels on the Bus" would fall more into the folk/children's folk category.
Children's folk has the musical elements of a folk song—a long-lasting, well-known melody and lyrical style with traditional instruments (this song can be played on most instruments, but typical variations are usually on piano). It is meant to be both educational and entertaining, which is what qualifies it for a children's song—which incorporates simple rhymes, repetition, and straightforward imagery to help a child learn certain concepts. I hope this helps!