Back in May 2012, Radioactive Rich (rest in peace) and Alex were clearing old kid stuff. We took their bike trailer off their hands.
And we've been using it at first occasionally, as I briefly got a behind my seat chair for the kid, then when that fell off in the great Halloween bike smooshing of '13, went with me using this trailer exclusively.

May 2012 at 9 months / July 2014 at 2 years and 8 1/2 months
(current is not my favorite pic, but shows scale best)
I don't wish to alarm you, but... I think I have a pre-schooler.
And we've been using it at first occasionally, as I briefly got a behind my seat chair for the kid, then when that fell off in the great Halloween bike smooshing of '13, went with me using this trailer exclusively.

May 2012 at 9 months / July 2014 at 2 years and 8 1/2 months
(current is not my favorite pic, but shows scale best)

These are not the droids you're looking for...
I don't wish to alarm you, but... I think I have a pre-schooler.