In general, they will do what you would expect. Many socials have an impact on character values, so there are far too many to be listed here - I've copied the lists from in-game and provided details on the traits you receive for each category. Parents can choose to restrict certain activities, like having friends over, using the computer, or gaming consoles. It provides a lot of correction to a bad behavior, and lasts 24 hours. The ultimate way to offset negatives is to use grounding. Try to praise or discipline when your parent Sim is in a decent mood to boost success rates. Telling them (or yelling at them) to stop doing something you don't like, will offset any negative experience. Praising will reinforce a good behavior by providing some bonus experience, assuming the interaction succeeds. You may also reward good behaviors by letting the child know they've done the right thing. You can choose to discipline bad behavior, either by being strict or calm. Many options require you to first level the parenting skill, which is probably something you should do while the child is in the baby/toddler phase.

Parents have access to socials that can greatly influence a young Sim's character values, so doing those things regularly will provide points or deduct them whilst simultaneously leveling the adult's parenting skill. It's worth nothing that since these levels change fairly regularly, you might 'lock in' your Sim's bonus trait by using a cake to age up when they are maxed out. Sims with certain traits might start with some positive or negative values by default.

That'd be average in The Sims 4 Parenthood. It's possible to age up and get nothing special if the Sim remains neutral. Since this is somewhat of a leveling system, you would have more time to have a positive (or negative) influence if you raised a child from toddler to adult assuming all goes well. Those who enforce no discipline may get a child who is irresponsible or argumentative. Players who have babies and raise them to be good will see those children get useful traits such as responsible or mediator. Youth is a time of changing behavior, thus there is time to correct bad behavior and reinforce good behavior to get a trait you want, or avoid one that you do not. This applies as long as those values are maintained or go uncorrected, anyway.

When a Sim reaches the extreme at either end of the spectrum, around 90%, they will get one of two traits for that category upon aging up to Young Adult. These values begin at a neutral level and can go into the positive, but also into the negative. Youthful Sims can gain or lose points in one of five categories, based upon their own behaviors and how their parent reacts to their behavior.

Discipline the negatives your child develops, and praise the positives to help them avoid bad traits. How it Works A 'Teachable Moment' chance card often has a positive and negative outcome.

Child traits sims 4