Joybell, your project sounds like fun!

Only one verse of "Down By The Bay" this song refers to "bugs" {if a fly is a bug}. But the whole point of the song is to substitute rhyming words:

DOWN BY THE BAY

Down by the bay
Where the watermelons grow
Back to my home
I dare not go
For if I do
My mother will say
"Did you ever see a fly
Wearing a tie?"
Down by the bay.

Down by the bay
Where the watermelons grow
Back to my home
I dare not go
For if I do
My mother will say
"Did you ever see a bear
Combing his hair?"
Down by the bay.

Down by the bay
Where the watermelons grow
Back to my home
I dare not go
For if I do
My mother will say
"Did you ever see a moose
Kissing a goose?"
Down by the bay.

Down by the bay
Where the watermelons grow
Back to my home
I dare not go
For if I do
My mother will say
"Did you ever see a whale
With a polka dot tail?"
Down by the bay.

Down by the bay
Where the watermelons grow
Back to my home
I dare not go
For if I do
My mother will say
"Did you ever see some llamas
Eating pajamas?"
Down by the bay.

Down by the bay
Where the watermelons grow
Back to my home
I dare not go
For if I do
My mother will say
"Did you ever have a time
When you couldn't make a rhyme?"
Down by the bay.

-snip-
http://www.songsforteaching.com/folk/downbythebay.htm

[This website includes a sound clip in case you don't know the song]