Sentence:  The Cat was sour-tempered and grumpy, at first, but before they had journeyed far, the crystal creature had discovered a fine <WSD>amusement</WSD>. The long tails of the monkeys were constantly sticking through the bars of their cage, and when they did, the Glass Cat would slyly seize the tails in her paws and pull them. 
Meaning of the word marked with <WSD> tags:  An activity that is entertaining or amusing, such as dancing, gunning, or fishing.