Rohan Murthy Has a Plan (The Kids in Mrs. Z's Class #2) by Rajani LaRocca
Rohan Murthy dreams of running a successful business like his creative and kind mom. When Mrs. Z announces that Curiosity Academy needs to raise money for a school garden, Rohan sees the chance to launch his dreams right away! He'll start a pet care company to help the people of Peppermint Falls look after their dogs, hamsters, fish, snakes, lizards . . . anything but cats. With hard work, some glittery posters, and the help of his friends from Mrs. Z's class, Rohan knows he can do a lot for the school garden.
His parents point out just one small problem: Rohan has never taken care of an animal before. They think he doesn't even like touching animals. (There is a reason cats aren't on his list.) To prove his parents wrong, Rohan volunteers to spend a weekend watching over Honey, the class guinea pig. But Honey appears surprisingly anxious, which makes Rohan nervous as well. When his big dreams meet his secret fears, what will Rohan do?