I'm sure that the song is played in E:



so the chords are E to A to B to E all the song repeated.



E chord:



E|--------|

B|--------|

G|--1-----|

D|--2-----|

A|--2-----|

E|--------|



A chord:



E|--------|

B|--2-----|

G|--2-----|

D|--2-----|

A|--------|

E|--------|



B chord:



E|--2-----|

B|--4-----|

G|--4-----|

D|--4-----|

A|--2-----|

E|--------|





to make it more interesting (chuck does so) play this at the beginning:



E|---------------------------------|

B|-----0-----0-----0---------------|

G|-----1-----1-----1---------------|

D|--2-----------2------------1--1--|

A|--------2------------2--4--------|

E|---------------------------------|



when the text comes in play this:

   

   E           A               B                    E

E|------------------------------------------------------------------|

B|-----0-----0-----2-----2-----4-----4-----4-----4-----0-----0------|

G|-----1-----1-----2-----2-----4-----4-----4-----4-----1-----1------|

D|--2-----------2-----------------4-----------4-----2---------------|

A|--------2-----------0-----2-----------2-----------------2---------|

E|------------------------------------------------------------------|

    When I was  a little biddy boy, my grandmother bought me a 

(make a little break to play the B part, Chuck does, too, because it's a 4/4 beat) cute little toy