Agree with almost everything said so far.
-Try switching autonomy off if it's too much.
-Ditch the high chair if there are multiple adults trying to put them in and out.
-Keep the toddler's inventory stocked with apples and bananas or whatever fruits/veggies you like. Good for an emergency snack and they stay fresh. They also get a happy moodlet when they eat them.
-Keep toddler books and toys in their inventory so they can take them out and play anywhere.
-Use the social option "play" as much as possible as it levels up both fun and social at the same time.
-Use the bubble bath instead of regular bath as this levels up hygiene, fun and social.
-Put them outside and tell them to run away so they give your Sim a break in the house. They can just run around for hours, it's great.
-Stock your fridge with meals so your adults don't have to cook as much or order lots of pizzas.
-Go on vacation and send them to daycare
