Tim the Mouse is Jealous of His Little Sister

The series of books about the funny and charming mouse Tim will help toddlers understand, recognize, and name their feelings, learn to communicate with their peers, and cope with difficult situations.
When friends go home, Tim has no one to have fun with. Oh, how he wishes mom and dad had given him a little brother for his birthday! A little one can be taught many things. And there will always be someone to play with... And one day, mom comes home not alone. But in her arms, she has not a brother, but a little sister! Now everyone is showering the baby with gifts and calling her beautiful, while they have completely forgotten about Tim. How can he not be jealous?