Before these talented tots were competing at the Olympics, they were just a couple of kids enjoying their childhood!
As the closing ceremony approaches and the summer games wrap up, we're taking you on a trip down memory lane to a time way before these big-time athletes were competing for gold!
From swimmers and gymnasts, to the track and field athletes ... The list of Olympic sports seems endless, but there's always more to add. This year there was the edition of karate, skateboarding, sport climbing and surfing.
Test yourself to see just how well you know these Olympic athletes by scrolling through our gallery of Olympic kids!