4 ideas
There he sees space pirates try to steal the mielophone, a mind-reading device, and he takes it back to his own era. Alisa follows him to the past, enrolls in his school as a new girl, and the children must find and protect the device while the disguised pirates hunt it among ordinary people who suspect nothing.
Alisa's father is a space zoologist, and many of her journeys, such as the Pegasus expedition in 'Alisa's Travels', are collecting trips for the Moscow Zoo. The galaxy is framed as a catalogue of strange life to observe, understand and look after, not as a frontier of threats. So a strange creature prompts the question 'what is it and what does it need?' rather than 'is it dangerous?'
The series stages space adventure without ideological enemies: the antagonists are pirates, thieves and smugglers, such as the recurring Rat and Veselchak U, who act from greed. Because evil is individual and criminal rather than systemic, it can be outwitted and caught instead of fought in a war. This lets a child hero win through cleverness and courage alone.
Alisa solves problems that adults miss because she notices small anomalies, asks direct questions and is willing to act on her own guesses. The adult world takes her seriously enough to let her take real risks. This makes curiosity a working skill that produces results, not a trait adults must manage.