Inna Nusinsky 
The Wheels Колелата The Friendship Race Приятелско състезание [EPUB ebook] 

English Bulgarian Bilingual Children’s Book. Perfect for kids learning English or Bulgarian as their second language.
What is friendship? Join three good friends as they discover what real friendship means. They start a race, but decide to finish it together, helping a friend who got in trouble. This book will teach children positive friendship skills like sharing, supporting, and helping each other.