Hey, I'm a little curious. Has anyone had a toddler that ran around a very big lot home? See, I just aged up my Sim's second baby, Lavender, and not only can she get out of her crib herself, she goes inside the barn, out to her father's farming field, and into the garage, usually bringing a toy to play with. The really weird thing is that she goes out the front door and through the garage's separate door, and the door to the barn in the back. She has not figured out stairs yet, thankfully, but I'm worried she'll hide somewhere where her parents can't get her.
Also, one of the NPC Sims got older, but she's a teenaged paper girl in all my Sim's relations for some reason. She does not come to my house anymore, but it's still confusing.