Place it right after the moment of agreement in your edit, preceded by the Ceeday Huh sound for a beat of confusion, then follow it with the Kids Cheering sound when the plan actually starts moving and the group commits to it fully.
Über diesen Sound
This is a very short voice clip of the phrase 'Ok Jacouille' delivered as a bright, exaggerated okay in about a second and a half. The delivery feels cheerful, silly, and instantly agreeable, turning a simple yes into a little comic performance that listeners understand even without any surrounding dialogue or context.