Ye and Kim Kardashian West surprised a bunch of kids as their tour of the east African country continues. But first, they had to get there ... and our sources say none other than the President of Uganda, Yoweri Museveni, gave Kimye permission to use his presidential helicopter so they could be flown to a kids' charity event.

We're told Kanye, Kim and their entourage were flown from Chobe, Uganda -- where they're staying -- to the event in Masulita, about 94 miles away. The pic above shows them arriving.

Kanye didn't waste time rapping for the kids ... who went wild as soon as they saw him and Kim. The kids sang but things got really wild when Kanye brought out several bags loaded with Yeezys. You gotta see their reaction ... frankly, it's just heartwarming.

As they were heading out ... Kim -- with Saint in tow -- was swarmed by reporters. Kim stopped to chat with them and shared some thoughts on her experience during their stay in Africa.

As you know ... Kanye gifted President Trump a pair of Yeezys last week, and also surprised the President of Uganda with his own pair. Neither was nearly as excited as these kids.

Well played, Ye!