i have a season pass when I reserved my date and time .it did not give me an option to say a have a 2 year old . does my 2 year need a reservation as well.

No, they are free, they can't have a pass so they can't be added

No Ma'am the child does not need a reservation...only guests 3 and older have to have a ticket and reservation

No a reservation is not needed for the 2 year old just let them know at the entrance

Children under 3 get into Knott's for free. Kids 3 to 11 require a Junior Ticket.