The book was more interesting/worse than he thought.
The toys were bigger/better/nicer/newer than he thought.
The children were cleverer/nicer than he thought.
The street was bigger/longer/more beautiful than he thought.
The hat was bigger/more beautiful/nicer/better/newer than he thought.
The film was longer/more interesting /better/worse than he thought.
The animal was bigger/cleverer than he thought.
The food was tastier/better than he thought.
The stories were more interesting/worse than he thought.
The woman was older than he thought.