In my opinion. I agree that it is good for children to study a foreign language as soon as possible. The main reasons are the importance for child's future and it's easier to learn at early age.
For example, I started learning English in school when I was 7 years old. I think it too slow to start learning.
Everybody known that children learn a foreign language easier and faster than adults.
Child's brain like a sponge which absorbs everything easily. Consequently, learning foreign language during this favourable time is a good way to make this process easier and more effective.
So learning foreign language by playing games and listening to the music also makes us learn foreign language easier for young people. Adults are often shy in such situations but children are not.