Thought I seen another thread on this subject but couldn't find it. Debating on how far to push my boys. The youngest (3) is on the trail-a-bike and the oldest(7) is on his own bike (single speed with 16 inch tires), the 3 year old does push me on the flats. So far we've did two rides 5 and 6.5 miles and those two show no signs of being tired! Thinking about pushing it next weekend with a 15 mile ride next weekend. There will be a couple breaks in there. I don't remember being able to ride distances like they seem to able when I was their ages. But their bikes are well greased and maintained.. never greased any bearings or even lubed a chain growing up!
Just curious on the distances other kids are able to ride. Kids do have amazing energy overall they'll probably do better than I will!