It must be remembered that the Gammera movies, like many of the first-series Gozilla films, WERE in fact aimed squarely at kids. Little Kenny and his cohorts are living out the daydreams of the kids in the audience: they get to run around and play with top-secret stuff while the adults stand by and allow it; they get to cavort with monsters, and even when the bad guys enter, they are never in any real danger.

Perhaps the first Gammera film is an aberration because the child DOES get punished and IS put into danger, but the rest of the series is pure wish fulfillment.

As one critic said, these aren't failed adult movies but successful kid's movies.