[throwaway0a5e]

You'll have an angry mob at your door if you even think about carrying a kid on anything with less than four wheels.

[Nbox9]

I see young children being carried by a trailer behind a bicycle often in the PNW region of the US.

[NikolaeVarius]

What. I see kids on bikes/trailers on bikes in NYC all the time.

[throwaway0a5e]

Count the wheels ;)

I chose my words carefully. Seems like bike trailers have mostly replaced those kid seats that used to go on the backs of bikes.

[ahoy]

I see these all the time in the more affluent areas of brooklyn. Two wheels, kids on the back.

https://cdn.shoplightspeed.com/shops/611178/files/23705435/y...

[reportingsjr]

I present to you this google image search: https://www.google.com/search?q=dutch+bicycle+kids&tbm=isch

[Obi_Juan_Kenobi]

Yepp seats are extremely common now. Nearly all cargo/utility bikes have compatible racks and often feature the child seats installed.

[ashleshbiradar]

you'll see mobs on 2 wheels in India.