Our dd at the young age of 2 attends a French immersion nursery school. For us this is because of two reasons. First we think it's great for kids to learn a second language, and they acquire it really easily when they are very young. Second, my husband's job requires us to move every one-five years, frequently internationally (so far Paris, London, and Dubai). We already have his next assignment which is Los Angeles, but his assignment after that will be international and likely Paris. So, we plan to send the kids to a private French elementary school b/c they will need the skill of having a second language and if we end up moving to somewhere besides Paris, we can put them in the French school there as all the French schools acredited by French Education Ministry follow roughly the same curriculum and scope/sequence.

Anyway, my dd has been attending the French school for six months now and has picked it up quite quickly. Having travelled extensively, I can say that a foreign language comes in handy everywhere. I speak four languages myself (English, Mandarin, German, and Russian) and I'm learning French along with my daughter. Even if I'm in a country where I do not know the language, I can usually easily find someone who has a language in common with me to ask directions or get information from. I think its an invaluable skill and once you learn one or two foreign langauges, it's really easy to pick up more. If your kids go to this program, they will be speaking Spanish close to fluently by 5th grade, and then would likely learn a third language in middle school/high school, and could go on to learn a fourth in college...not that they would have to but they would have the opportunity to. Of course even knowing one foreign language is a great resume booster as well.

I don't see any way it could hurt your kids in kindergarten, and if things don't go well you could always place them out of the program for grade 1.