Use reins until they are capable of road sense and not running away!
It takes seconds for a child to end up under a car.
I'm not going to try and lecture anyone on whether they should be used or not, but I will say, if you don't want to spend the rest of your life with grief, depression, suicide attempts (ex husband) and cemetery visits, then use the bloody reins!
31 years without my son, it doesn't get easier, it gets worse, seeing his twin sister have birthdays, a wedding day, children, knowing he should be here celebrating with us, not us going to visit his grave to tell him all the wonderful things that have happened, he's an uncle, a brother in law.
He should be a man, a husband, a daddy instead he's forever 2 years old.
So it's up to you if you want to use reins or not, if you don't want to use reins, use a wrist strap, a back pack, or piece or rope, just keep your child safe!