Songs depend on the age of the kids, teacher's lesson plan, school festival theme, etc. Bera in mind that I'm in USA, so nearly everything that I do goes back to a multicultural theme.
    I like to use Black jack avey in it's many incarnations.
    Play "How old are you my pretty little Miss," explainin that that kind of song, where kids can make up the evrses as they go along, was the kind of entertainment that kids had for millions of years, before TV and video games.
    Have them do a few spontaneous verses.
    Explain then that it probably came from another song, Black jack Davey or (maybe), the "wraggle Taggle Gypsies."
    Sing Black jack Davey, and let themguess how old it would be, and have a discussion about the young girl and her baby, etc.
    Take it to the possible historic origin of the song, with the removal of the gypsies from Scotland in thew 1600's. Personalize it with Jahnny Faa, the gypsy in the story.
    Go to the potatoe famine in Ireland, and songs like "Paddy Works on the Railroad" or "The Little Sod Shanty."
    Remind them that I'm part American Indian, Irish English, Scottish, Welsh, german, Spanish, French, and (maybe) African. Ask them if theyknew where their ancestors came from, etc.
    Whole idea is to make "History and our great grands come alive."
    Tough part is to have an immagration song for every natioality.