hey guys i really want help with harvest moon a wonderful life special edition ps2?

i am on chapter 3 (the harvest) and i had married muffy now my son grow up a lil bit and he refuse me to carry him how i make him in the future a farmer plz i want help first one to answer right get 10 points
i am in chapter 3(the harvest) and i had married muffy now my son have grow a lil bit and i can't carry him to show him things i want him to be a farmer what should i do???also how to get ducks???? i have buyed a pond