Lincle, I think Greenwood has the better idea. Bespoke dolls houses are not really for children and can be very expensive , even the kit forms can be expensive. A three year old would be far better with one that is on the website shown on Greenwoods link.
I did think it might be for yourself initially.
...and those who were seen dancing were thought to be insane by those who could not hear the music.FN