My 6yo just rode his bike without training wheels
Dude. DUDE. After like 3 weeks of practice he just took off down the driveway without me holding on and made it all the way to the mailbox. My wife was inside and I literally yelled loud enough that she came running thinking something was wrong lol. He did a little wobble at the end but kept it upright. We're talking about this moment for the next 20 years I guarantee it.
That's huge! That first moment when they take off without you is something you never forget. Three weeks of patience paying off right there. Now get ready for the scrapes and bruises that come next because they're gonna want to ride it everywhere.