A story about first love of two boys and a neighbor girl...

A schoolboy Petya is working on inventing space elevator, super-technological kitchen and a lot of other things.

Two curious first-graders decide to steal a turtle named Rocket from a living corner to conduct a risky experiment — they want to put it under the tank in order to check the carrying capacity and strength of the shell. But their classmate Tanya is smarter than her friends: with the help of adults, she manages to organize the rescue of the unfortunate turtle.