A young engineer, Štěpán Pavlík, dreams of becoming a cosmonaut.

1976 film directed by Jindřich Polák

During a summer holiday, two boys discover an anti-gravity cannon in an old attic.

While on vacation with their bickering parents, young Eva and her little brother Johnny find in a polluted lake two strange friendly sentient octopuses made of strange material that attracts electricity. They take them as pets.