2x10 - Mona the Vampire

A) There's a new boy at Mona's school, Robin, he knows a lot about birds, understands them, actually... he looks like a bird himself and, misteriously, everytime that someone botters him the birds attack that person. B) Lily got a new plant, she takes good care of it, water it everyday and is investigating what kind of things it likes and dislikes. Mona wants to get one too, but when they go to the store there were none left, the park caretaker bougth all of them. Charley saw on Tv a new protein beverage, he wants to buy it, but when he goes to the store there are none left, the park caretaker bought them all. What is the park caretaker planning to do with plants and protein beverages?