I enjoy biking with my brother a couple times a month. My average is typically about 3mph faster than his so I tend not to get much of a workout on these rides. Yesterday we had perfect conditions; 60F sunshine and absolutely no wind! The problem was my wife had other plans and I had no one to watch our two youngest (7 and 8). I couldnít stand to pass up such perfect weather, especially with winter looming; so I put the 8 year old on the back of the tandem (with a kidís stoker kit) and the 7 year old behind on a single speed tug-a-bug. What an equalizer!!! We put on 30 miles of rolling hills; the kids did great! They whined early, until the mention of stopping for a treat! The conditions were perfect so we even had a higher average speed than normal. What a great ride!