Did/do you have only one child part or multiple child parts?
I have identified 3 distinct child parts. Little boy (age 4-5), Older boy (10-11), Younger girl (12-13)

What does it mean to you that the child part is in control?
Mostly it is the internal or instinctual responses to things. Rarely/occasionally, the little boy (pouting) and younger girl (anger rants and erratic declarations of doneness) have emotional responses to the extent that there is an outward behavioral response. The older boy plays more of background role and is actually more running the show in being distant from people and focused on following rules, structuring life, routines, and order.

How much of your daily life did/does the child part control?
A lot of the time it is hard to tell where the I/adult and the older boy are different; however, there is a subtle and major difference. The older boy kicks in from an emotional response - there is an emotional component to my actions when he is in control. The adult is just doing because it is what life is.

How did you used to respond to the child part before working on it?
Shame, criticism, lock away, try to control them, discount them, not listen to them.

How long did you work primarily through IFS or child part?
Just really starting, I'd say 6-9 months in.

What/how do you respond/address the child part now?
I started by acknowledging and treating them as independent and self contained parts. I had been trying to listen to them, trying to understand what happened to bring them forward and what gifts they provide for me. I (the adult) had started letting each of them be heard and try to address each of their concerns with situations presented to us. I was trying to act more as a mediator between the parts and what is best for the unit as a whole rather than just what the adult expects. This meant that I was allowing the parts have time to just be and exist when not emotionally triggered.

Right now, I'm in a set back state and trying to box them up and lock them away again. I'm feeling like they are not welcomed or wanted anymore. It's harder to push them back and lock them up than before, and I miss them.