My son Ethan had all his wetsuits from when he started playing in the water.  Here is a quick video of what he went through to get to where he is now.  Started with 3mm, full, half, 7mm (YAHOO!) then accessories.

Awesome video!  Now I know which brands to look at as my daughter grows. 

I'm currently looking for suit for my daughter who is 6 but don't want to spend to much $ as she is growing fast. Not a suit for diving just yet but one to just cruise around on kayak and the occasional dip when flipped. Not to steal thread or anything but 2-3 mil should be plenty for here uh?
Any brands in particular I should go/not go with?
Or Ethan or anyone else have used gear they willing to part with that be awesome. She is 6 about 4"1 and 39lbs.
and life vest needed also