The cuckoo clock

Would you like some cream in your coffee, Mrs Clark? 
Mrs Clark:    No thank you. But I’d like a little milk. 
Mrs Cook:    Would you like some chocolate cakes? 
Mrs Clark:    Thank you. 
 Mrs Cook:    Take two. Here’s a cake fork, and here’s a …  Mrs Clark:    Excuse me, Mrs Cook. But what’s that next to your bookshelf? Is it a clock? 
Mrs Cook:    Yes. It’s an American cuckoo clock. Mrs Clark:    Is it plastic? 
 Mrs Cook:    Oh, no, Mrs Clark. It’s a very expensive clock. It’s an electric clock. 
Mrs Clark:   Well, it’s exactly six o’clock now, and it’s very quiet. Doesn’t it say ‘cuckoo’? 
Mrs Cook:    Of course, Mrs Clark. Look!  Clock:       Cuckoo! Cuckoo! Cuckoo! Cuckoo! Cuckoo! Cuckoo!
 Mrs Clark:    How exciting! What a clever clock! Clock:       Cuckoo!