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

'ere goes.

INTRO:
F

VERSE 1:
F                  Bb          Eb        Ab
A mouse lived in a windmill in old Amsterdam
  C#              F#           C         F
A windmill with a mouse in and he wasn't grousin'
F             Bb          Eb        Ab
He sang every morning, "How lucky I am ,
C#          F#           C         F
Living in a windmill in old Amsterdam!"

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

Oh yeah

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

REPEAT CHORUS

KEY CHANGE - F#

VERSE 3:
F#             B           E             A
First they had triplets and then they had quins
  D             G             C#          F#
A windmill with quins in, and triplets and twins in
F#              B            E        A
They sang every morning, "How lucky we are
D          G           C#         F#
Living in a windmill in Amsterdam , ya!"

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

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

Oh yeah

VERSE 4:
F#                B           E          A
The daughters got married and so did the sons
    D            G                C#          F#
The windmill had christ'nin's when no one was list'nin'
F#              B            E        A
They all sang in chorus, "How lucky we are
D          G           C#         F#
Living in a windmill in old Amsterdam!"

REPEAT CHORUS

OUTRO (play slower)
F#                B             E          A
A mouse lived in a windmill, so snug and so nice
    D            G             C#          F#   N.C
There's nobody there now but a whole lot of mice.

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