27 to early 30s maybe 🤷🏻‍♀️. I worked with little kids before and seriously they take so much energy, if you have kids when you're above 35... say hi to backaches and it's tiring really. Around 27 people's brains is completely developed(usually the brain completely developed around 21-24 yo if I'm not mistaken) and hopefully around 27 most people are financially stable. But that's just my opinion...