Deep and wide, deep and wide, there's a fountain flowing deep and wide. [Repeat.]
Sing the words as written the first time through. Then, instead of saying the word "deep", make a gesture (one hand above the other) to show depth. The next time, also show "wide" by spreading hands out to the side for width. Continue with "fountain" (make a fountain-like gesture), and "flowing" (make a rippling gesture with hands moving from one side to the other at chest level).