Yes learning languages at young ages (about 2-5 years old) is good, don't do it to young they need to get there primary language right first before they can translate, people in Holland learn English at a young age and I've not come across one dutch person that can't speak English.
I studied French when I did GCSE and I got a G in it, since I did it at a later age, and I just couldn't get to grips with it, so the younger the better, though I do want to learn another language like german or spanish sometime...