Advice on Cubby House

I’m looking at getting my 20 month old daughter a cubby house soon, something that she can have a play kitchen and table in, has a slide and is spacious enough for an adult to also be comfortable in. I’ve seen open style cubbies that only have 3 walls, I like this idea because it makes it nice and light, open and airy. Not dark and enclosed like a traditional 4 walled cubby. But I’m not sure whether this open style would suit the Canberra climate. What type of cubby houses do your children enjoy and where did you get them from?