Yeah both of our kids have been on the boat with my wife and me since they were 6 months old. Fruit snacks and bubbles kept us on the water. Also buy an extra couple dozen minnows for them to play with.
My daughter has loved fishing since she was around 2 and has helped teach her two younger brothers. I love watching her get mad when they get bigger fish than her, she becomes determined to beat them and I practically have to drag her into the house.