This is Siwon's first activity since his discharge from the military on August 18. On August 21, the idol star flew over to Vietnam to volunteer at Danang Inclusive Education Center. He is taking part in UNICEF's campaign to help children learn music, the 'SMile for U' project

Siwon was spotted interacting with the children, playing instruments with them and participating in arts and craft activities, spending quality time overall.

He also smiled brightly in front of the camera as they posed together with the children and staff members proudly wearing his UNICEF t-shirt.

SEE ALSO: Super Junior Siwon's first official activity since his military discharge will be a volunteer mission trip

170822 Siwon interacts with student of Danang Inclusive Education Center.. It's so adorable pic.twitter.com/zKHl64p8zi

— 다라프렘 SIWON (@SIWONstorm) August 22, 2017

How generous!