*Note: My version of a C/G is a C major with the bottom E played on the third fret :)
            C5          C5     C5         
It's fun to run, it's fun to play,
      C5     G5
It's fun to make things out of clay,
             F5
It's fun to fill your car with gas,
              G5                         C5    C5  C5 (Play A5 few more times)
It's fun to break.... things made of glass!

      E5
But broken glass can cut your hand, 
      C5                   G5
And then you'll bleed across the land,
      E5     
Ask any woman, child or man,
      C5                 D5
The dangers you could pass 
              C5         G5
With broken glass...
          C5       G5
Broken Glass....
 
             C5      C5     C5  
But broken glass is not a food,
C5               G5
So don't you listen to some dude,
                F5
Who says put cheese on broken glass,
              G5
And make A5 sand - A-wich! 
         C5          C5   C5 (play a few more times)
Out of broken glass...

          E5
Broken Glass isn't good for your tummy,
   C5                         G5
Although you may think it's kind of yummy,
        E5
Don't eat that glass, don't be a dummy, 
C5               D5
Just stay in school 
                 C5         G5
and don't eat broken glass,
                   C5       G5
Don't eat broken gla-ass,

               C5          C5     C5    C5
Let's sing a song about broken glass,
 C5                G5
I'll help you write it after class,
              F5
There is no song that can surpass
               G5
The song we sing,
               C5     C5   C5 (play a few more times)
About broken glass...

[HARMONICA SOLO!] *continue C - C/G chords through harmonica solo!*

               C5          C5     C5     C5
Let's sing a song about broken glass,
C5                G5
I'll help you write it after class,
              F5
There is no song that can surpass
              G5  (mute)
The song we sing,
 *no chord*                   C5 (let ring)
[Spoken:] About broken glass...