Bah... where are all the posts?!! lol

Please forgive me for asking this as I'm sure it's been asked tons of times before... but I'm at the library right now and they time how much time you are allowed on the 'net.

At what age do you think it's appropriate to introduce young children to Aikido? For instance, I have a son... and while he's not anywhere near an age where he's able to train (ie, he's only 5 weeks old), I would eventually like him to train in Aikido.

Thanks in advance!!
Sita.