Howdy!

Emma I missed your post - kids need to wear a helmet when being towed behind a bike so I reckon they would have to be fully sitting up with head control before it was safe.

MG we bought the Trek from our local bike shop for $700 (rec retail was $900 but it was "new old stock" someone had ordered it a few years ago and didn't pick it up).

Trek trailers are the "poor cousins" of Chariot trailers. Chariot make bikes and sell really snazzy versions of the Trek as well as harnessing and seating systems for newborns and real young bubs - I am not sure if they are compatible with the Trek though. We looked at the Chariots but preferred the folding and brake mechanism on the Trek would you believe. Nice when the cheaper option is "better". Treks are now about $900 to $1000 but comparable Chariots were at least $1500 and the baby seating systems were extra on top ($100 for the "baby bivvy" and another $100 for the harness).

The Chariots, like the Trek, can be prams, joggers (with a single front wheel) or hitch to a bike, but also have attachments for cross country skiing and cross country running (where you hitch it to your waist like a rickshaw).

I think if you were prepared to spend the dollars a Trek (or Chariot, if it floats your boat) are really worth it, partly for the ease of movement, partly for the versatility, and partly for the weight - at 32 weeks pg I can still lift the Trek into the back of a station wagon without too many problems!!! Show me a twin pram that is that light!