Here's another one (though perhaps it might be a bit too long and complicated for pre-school chidren as might be the case for 'The Keeper' given above)

In a wood there grew a tree,
The best tree you ever did see,
And the green leaves grew
all around, all around,
And the green leaves grew all around.

And on this tree there was a branch,
The best branch you ever did see,
The branch was on the tree,
The tree was in the wood,
And the green leaves grew
all around, all around,
And the green leaves grew all around.

And on this branch there was a nest,
The best nest you ever did see,
The nest was on the branch,
The branch was on the tree,
The tree was in the wood,
And the green leaves grew
all around, all around,
And the green leaves grew all around.

And in this nest there was an egg,
The best egg you ever did see,
The egg was in the nest,
The nest was on the branch,
The branch was on the tree,
The tree was in the wood,
And the green leaves grew
all around, all around,
And the green leaves grew all around.

And in this egg there was a yolk,
The best yolk you ever did see,
The yolk was in the egg,
The egg was in the nest,
The nest was on the branch,
The branch was on the tree,
The tree was in the wood,
And the green leaves grew
all around, all around,
And the green leaves grew all around.

And in this yolk there was a bird,
The best bird you ever did see,
The bird was in the yolk,
The yolk was in the egg,
The egg was in the nest,
The nest was on the branch,
The branch was on the tree,
The tree was in the wood,
And the green leaves grew
all around, all around,
And the green leaves grew all around.

And on this bird there was a feather
The best feather you ever did see,
The feather was on the bird,
The bird was in the yolk,
The yolk was in the egg,
The egg was in the nest,
The nest was on the branch,
The branch was on the tree,
The tree was in the wood,
And the green leaves grew
all around, all around,
And the green leaves grew all around.