Last Memorial Day weekend, we used Giant's version of the Trail a Bike for transportation around Ocracoke Island, NC (great place). My daughter loved it, and I was delighted at how much less work it was than pulling a trailer. In fact, we did a 14 mile trip in slightly over a half hour each way.
Her day camp is approaching, and she has already been taliking about how she would like to do the daily trip on a Trail a Bike, rather than in our InStep trailer. Since there are some significant hills on the way, this does not seem a bad idea to me either.
What makes of Trail a Bike clones have you used, and how well have they worked? A rear fender would be good as it does rain in the summer here. She is six. The Giant model worked quite well.