Les défis du Professeur Muchi is a free educational game app developed by France Télévisions for Android devices. It is designed as a summer workbook in the form of a game to help children revise their lessons in a fun and engaging way. The game offers various challenges in English, French, mathematics, science, history, and geography for children from the first to the ninth grade.

The game features different challenges and tests to help children test their memory and knowledge. By mastering each challenge, children can earn different elements for their avatar, which they can use to display their mood and dress up their avatar to face the multiple challenges prepared by the Professor Muchi. The game is designed to be challenging yet practical, as children need to memorize the lessons to win.

Moreover, if children want to prepare for the upcoming year or explore their favorite subjects, they can simply erase and test the following year. The game is also available on the francetv éducation website and can be played on mobile, tablet, or computer with an internet connection. Overall, Les défis du Professeur Muchi is a great way for children to revise their lessons during the summer break while having fun.