It's buried really well on page 31 right by the cow.
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Handle on drawer. Page 13.
It is written around the edge of the bucket.
The mermaid is in the land in "now they're looking for me on land and sea ". On page 15. The land all by itself
In between the 2 flower stalks on page 28, its outside the window
The fish is in the rocks just above the rowboat on page 21.