Professor Rocca's Summer Plans

Professor Rocca was preparing for his two grandchildren Mandarin and Apricot to spend summer vacation with him. But a rat with a hat also appears, can he get rid of the rat?

Professor Rocca was a plant scientist. He decided to prepare his farm before his two grandchildren, Apricot and Mandarin, came in two weeks' time. They were going to spend their summer vacation with him.