Harvard.edu:

New parents who want to cycle with their infant, toddler, or young child have two basic choices. A seat which attaches to the bike behind (usually) the rider, or a trailer which tows behind the bike.

This article is definitely colored by my opinion, which favors the trailer, and some of the safety issues below can sound scary. But ultimately, you have to like your choice, not me. If you feel better with one choice over another despite what I say, then by all means go with your gut. Both choices offer reasonable protection (when used with a helmet) and there’s no point in buying something you won’t use. Accidents are rare enough that you shouldn’t let your fear prevent you from sharing cycling with your small child.

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