This song is played with a 3/4 time signature and in the key of F.

'ere goes.

INTRO:
F5

VERSE 1:
F5                  Bb5          Eb5        Ab5
A mouse lived in a windmill in old Amsterdam
  C#5              F#5           C5         F5
A windmill with a mouse in and he wasn't grousin'
F5             Bb5          Eb5        Ab5
He sang every morning, "How lucky I am ,
C#5          F#5           C5         F5
Living in a windmill in old Amsterdam!"

CHORUS:
F5       Bb5
I saw a mouse!
Where?
F5
There on the stair!
C5
Where on the stair?
      F5
Right there!
                    Bb5
A little mouse with clogs on
F5
Well I declare!
      G5             C5           F5
Going clip-clippety-clop on the stair

Oh yeah

VERSE 2:
F5                  Bb5          Eb5        Ab5
This mouse he got lonesome, he took him a wife
  C#5            F#5           C5          F5
A windmill with mice in, it's hardly surprisin'
F5              Bb5          Eb5        Ab5
She sang every morning, "How lucky I am ,
C#5          F#5           C5         F5
Living in a windmill in old Amsterdam!"

REPEAT CHORUS

KEY CHANGE5 - F#5

VERSE 3:
F#5             B5           E5             A5
First they had triplets and then they had quins
  D5             G5             C#5          F#5
A windmill with quins in, and triplets and twins in
F#5              B5            E5        A5
They sang every morning, "How lucky we are
D5          G5           C#5         F#5
Living in a windmill in Amsterdam , ya!"

(now because of the key change, the next chorus uses the following chords)

CHORUS:
F#5      B5
I saw a mouse!
Where?
F#5
There on the stair!
C#5
Where on the stair?
      F#5
Right there!
                    B5
A little mouse with clogs on
F#5
Well I declare!
      Ab5            C#5           F#5
Going clip-clippety-clop on the stair

Oh yeah

VERSE 4:
F#5                B5           E5          A5
The daughters got married and so did the sons
    D5            G5                C#5          F#5
The windmill had christ'nin's when no one was list'nin'
F#5              B5            E5        A5
They all sang in chorus, "How lucky we are
D5          G5           C#5         F#5
Living in a windmill in old Amsterdam!"

REPEAT CHORUS

OUTRO (play slower)
F#5                B5             E5          A5
A mouse lived in a windmill, so snug and so nice
    D5            G5             C#5          F#5   N.C5
There's nobody there now but a whole lot of mice.

(to which the mice sing)
Oh yeah!!!