In the book How did grandpa make jay berry feel very grown up?

In the book "Summer of the Monkeys" by Wilson Rawls, Grandpa made Jay Berry feel very grown up by trusting him with important responsibilities, like taking care of the family's hunting dogs and entrusting him with the task of catching the monkeys causing trouble on their farm. Grandpa also encouraged Jay Berry, listened to his ideas, and treated him with respect, which made Jay feel mature and capable.