recommend roughly one year as the starting point, or earlier with additional support if the child can hold his/her head up with a helmet on).
|J being shy in the trailer. Pose for Daddy's blog? HA!|
There are other good trailers out there (not to mention many many different ways to put a kid on a bike instead of behind it) - but this one has worked very well for us. It takes up to 2 toddlers comfortably, has space for 2-3 large reusable-grocery-sized bags in the back, and has both a mesh cover and a rain cover that can snap down (front and back) or roll up out of the way. It also holds a flag and has a spot on back to clip on a blinky light - I make sure that we always have at least one of those, depending on when we're riding. On the rare occasions when we need to travel with it, it folds flat and the wheels come off easily - thus we were able to bring it on vacation with surprisingly little effort (in a car... I would probably not recommend taking this through an airport...).
If you purchase a bike trailer, I highly HIGHLY recommend getting one used. These things are not cheap - used or new - but they hold value pretty well as long as you take care of them - I imagine I could probably get very close to what I paid for mine if I re-listed it on Craigslist now. That said, get a reputable brand - Burley and Chariot are the two best-known - and make sure everything functions as it should. There are cheaper ones out there, but if I'm carrying my kids in something I want to know that attention was paid to quality. In this case it was, and it shows. We look forward to enjoying this trailer for several more years, and hope to hand it off to another family to enjoy once we're done with it.
Disclaimer: I have not been paid, bribed, threatened, or otherwise encouraged to mention specific products or brands on this blog.