A sunny puzzle centred around an iconic symbol of the Netherlands: the windmill! Large, solid expanses of blue offer the opportunity for long episodes at the puzzle table. Are these straight pieces part of the edge... or are you being tricked? The similarity of the soft cumulus clouds can easily mislead. Does this piece go this way or that? For the ultimate challenge, this image is available as a 600-piece design. If you long for an extended session of stretching your gray matter, this might be just the one for you!