Art style: Pixar-like 3D.
Camera dynamic low-angle push-in moving towards the cardboard fortress. The boys peek out from behind cardboard turrets, giggling and saluting each other, then jump up and dash towards the open backyard door.
SPOKEN LINE — AUTHORITATIVE, overrides any line quoted earlier in this prompt:
The only words spoken, in Russian, verbatim: Макс: "Поднять паруса форта! Секретн...
