Crime in the Green Notebook. Chemical Crime: Flip Book

It seems like you are interested in detectives? Then we have great news!

By reading these mysterious stories, you will become a partner of the main characters, face riddles, codes, and help find solutions to challenging problems in order to catch two dangerous criminals hiding on the pages of the book.

On a rainy day, Roma Zephirov, a student of the 3rd grade 'B' class at school No. 7, had a robbery at home. Right under the student's nose, his... you won't believe it, his math homework disappeared! To find the thief and fix the undeserved failing grade, his friend Mashka, who knows how to take fingerprints and interrogate suspects, will help him. Roma and Mashka didn't enjoy their solved case for long, because the next day at school number 7, a crafty criminal stole ten boxes of chalk from the chemistry room. Even the attentive principal, who always keeps an eye on order, didn't notice the thief! Everyone came under suspicion: the gym teacher, the labor teacher, the math teacher, the cook, and even the chemistry teacher. The principal would have searched for the thief for a long time, but Roma and Masha found a clever way to catch the criminal.