A call and response song I like to use to differentiate between the childrens’ voices and my own. They respond back to me up an octave.
Key of G, normally on guitar.

Lyrics:
Down by the Bay (Down by the Bay)
Where the watermelons grow (where the watermelons grow)
Back to my home (Back to my home)
I dare not go (I dare not go)
For if I do (For if I do)
My Mother will say (My Mother will say)
Did you ever see: *Insert rhyme*
Down by the Bay!

Rhymes:
-a fly wearing a tie
-a goose kissing a moose
-a llama wearing their pajamas
-a dog sitting on a log
-a cat wearing a hat
-a bear combing his hair
etc. I like to have the kids come up with their own rhymes or I will use their names to rhyme one.