You could sell them for adults. There are lots of grown ups who love dolls' houses. A friend got one from her partner for Christmas. She is very creative and has been making tiny items and little dolls, 1:12 scale. She showed me very proudly and I was amazed at her skill.
I think she said her partner bought the dolls' house and all the accessories as a job lot on eBay.
Talking throughout an exercise class
I'll let you know when I decide what to do with them.
Oh how I wish I could give them a home. Let us know if and how you part with them.