Giannis Antetokounmpo Gifts Sneakers To 8-Year-Old In Heartwarming Postgame Gesture

Heartwarming moment in the NBA on Tuesday ... Giannis Antetokounmpo hand-delivered his kicks to an 8-year-old fan who was celebrating a birthday -- and the gesture was AWESOME.

It all went down after the Milwaukee Bucks finished beating the Orlando Magic ... when the Greek Freak noticed a kid with a really cool sign.

"Giannis," the big note read. "Today is my 8th birthday. Wanna trade shoes?"

Antetokounmpo raced up several rows at the Fiserv Forum to hand off his sneakers -- and the little boy was pumped!!

Check out the footage ... the kid could barely hold Giannis' size 16 Nike Zoom Freak 2s -- they were damn near as big as his body!!

Of course, Giannis didn't take the kid's shoes in the deal ... so, total win-win for the fan, right??

The gesture is not unusual for the 26-year-old, two-time MVP ... he's been known to give out game-used stuff to young fans following games no questions asked.