Innovative Arduino project

Innovative Arduino project :
1 - Robot Arm
2 - Obstacle Avoiding Robot
3 - Control Light with your voice
4 - Send SMS when temperature exceeds certain limit
5 - Control Robot car with smartphone
6 - Line Follower Robot
7 - Turn on 220V load when temperature exceeds certain limit

check that video

what do you think about that course content?
how can i improve the course ?
do you have any suggestion for a projects to add it to the course ?