My 6 year old daughter absolutely loves her Islabikes Beinn 20"Small. It is super lightweight and rides great. We just rode 18 miles total in the last 3 days with her, she can average 9mph for 6+ miles on flats, no problem. I highly recommend Islabikes to anyone serious about riding with their little ones. My 9 year old son has been riding a 24"Trek for the last year and a half.