So you could just be a toddler and be really smart and you could show off or something I don't know. And when I mean restart I mean actually restart, you would have the same family and everything its like you'd go back in time

Probably. 'twould save me a lot of childhood bullshit.

If I could go back in time, retaining everything I know now: then sure. I would be an economic oracle when it comes to the financial crisis and I could actually do good in school, not take speech classes, and probably skip out on all that stuff they put me through because of my ADHD diagnoses back in the day.

I'd be the nineties again and I would be guiding my parents through the dotcom boom and we'd be golden.

Sure. A talking baby that can predict up to twenty seven years into the future would be badass. The minute I am (re)born I'd say in perfectly clear English "Donald Trump gets elected President in exactly twenty seven years and one week." The look on the Doctor's face would be amazing.

But even if we cut out the weird shit and assume that this knowledge returns to us at appropriate times in our development, definitely yes. I'd get to relive my childhood, which was pretty great, I'd have no adolescent idiocy, I'd of course be able to make better life decisions, and I'd have all the knowledge I have now as a base to build from, so I'd be a sharp motherfucker.