do it!!! dont worry about mistakes, but there's nothing better as learning another language as second mother-tounge.

never ever again would the kids learn easier.

if i would have the chance, i would do it.
but my english is too bad

buut .. we sing a lot in english and xander loves dora the explorer (in germany they use a lot of english words), he is 2 years now and can count until 6 in english *proud* (he cant do that in german, but stuff it )

its a good chance for your kids...