So I build a house, upgraded it complete with bedrooms. I went to every workbench in the house and tried to build "Child's Beds" or what ever they are supposed to be called and none have that option. I have the option to build "Single Bed" (x2) and a "Double Bed", but even after building all three of those I cannot adopt because "I do not have space". As far as I'm aware those single beds are meant for bards and what not, so that makes sense. But how exactly do I go about building the children's beds.

i think there is a specific room in each house, you have to build the beds in those rooms, not sure if they are called kids bed or not though

I heard you could do it in the main hall, but I'm not seeing the options. I think I'm missing some pre-req but I have no idea what it is.

You need to build the Dresser upstairs in the Main Hall, as well as the Single Beds, before you can adopt.

Dresser? I thought it was chest you needed. Blah! Thank you.

Once you do adopt, the kids will leave stuff in there for you.