In my opinion. I agree with that it is good for children to study a foreign language as soon as possible. The main reasons for it are the importance of foreign language studying for child's future and the easiness of learning at early age.
Example me, I start learning English in school when I am 7 years old. I think it too slow to start learning.
Everybody known that children learn a foreing language easier and faster then adults.
Child's brain like a sponge soaks everything around easily. Consequently, the learning of a foreing language during this favourable time is a good way to make this process easier and more effective. The effective way to fasten foreign language learning is to use games in the process of studying so children obviously are more perceptive for such way of learning.
So the learning of a foreign language by playing games and by song also makes a foreing language learning easier for young people than for adults. Adults are often feel shy in such situations but children are not.