All four of my boy spawn have VFF. My youngest two got to try out for review the Kid Sprints and they love them.
I put photos and video on my blog review. I like them for the minimal aspects but also the ease of getting on toe shoes on kid feet.
The Sprints are super easy to get on since you have access to get the piggies into the individual toe pockets.
Check it out!http://www.babsreviews.blogspot.com/2012/06/vibrams-five-finger-kid-sprints.html