Cats had different preferences. Some cats liked the red dot from the laser pointer, some liked the cat scratch board, some liked playing the Whack-A-Mole game, and some liked the cat teaser wand. Even the catnip failed to win the favor from all of the cats.
After picking up each toy and playing with the cats, Zhang Zian found out that each cat liked a different toy. He could better distinguish the cats now so that they wouldn't surround one customer at the same time. He explained to Fina in a far-fetched manner that the toys were for improving the cats' reaction speed and agility. Fina believed him. It was a bit difficult for him to explain the use of catnip, so he simply said the catnip was to relax the cat after training.
"Then what do you need me for?" asked Fina in confusion.