I've been trying to remember the name of my favourite childhood toy- it consisted of different sized green plastic boards, with a kind of criss-cross pattern of slots- which you could slot in house shaped pieces of wood- to make up the layout of a town. I remember on some of the house pieces, there were mice characters printed on...

But that's all I can remember, and it's driving me crazy not being able to recall the name >.<

Any help would be really great!
Thanks!