I need gameplay ideas that are fun and chaotic, yet long term

I think having six or seven toddlers can be pretty chaotic, especially if you have a single parent with a demanding career and no money. Making the sole caregiver an elder could make things more challenging, since elders tend to need more sleep in this game. You could also make the elder a rebel who doesn't believe in work, so they have to earn money by finding seashells and knitting. And then give all the toddlers difficult traits, like Wild and Fussy. Train the game to make them autonomously make constant messes. And make the elder a mermaid who doesn't have a swimming pool.