[Closed] Tag-a-long / Trailer bike recommendations?

currently have a trail angel tow-bar, which is achly great and doesn't suffer any of the foibles those trail-gator ones seem to. recommended highly.
but i'm just considering a one-wheel tag-along/trailer-bike, preferably with gears, so's i dont spend all my time attaching and detaching when my daughter wants to play on her bike, and so she can actually contribute when she pedals! currently spins away on a tiny 14" wheel bike doing exactly nothing, bless her.

so can anyone recommend me good ones? good/bad experiences?