This is the nature of cats, especially kittens, who are very naughty. If you don't want him to climb the table, pat him on the head and yell at him when he gets up, telling him not to climb. Remember to speak loudly so that he can understand. I won't be so presumptuous next time. And provide him with some other toys, such as table tennis, or a wool on the ground, just to distract him. He went to your desk to make trouble just to play with what was on your desk. Small animals also need the correct education of their owners.