I am circle and also white
And I am poison so use me wise
Bubbles, bubbles, flutter and fly
But when I am touched I will die

Bubbles, bubbles, float in the top
But be careful 'cause I will pop
Blow soft to sustain my air
Make sure my bubbles will be shared

Bubbles, bubbles, float away
You use me day by day
So come on and let me be
Go out and blow with me

Geneen Meyers

http://www.poemhunter.com/poem/bubbles-34/