Place it at the very end of a short family clip, after the build-up and before the credits hold. Follow it with the kids cheering sound for a bigger family reaction, or keep it alone as the final beat without anything after it.
このサウンドについて
A very short clip of a baby clearly saying the word papa, in a small, soft infant voice. It feels sweet and heartwarming, the kind of proud, tender moment that makes listeners smile instantly because it sounds like a first word aimed straight at dad.