There is no specified "theme", and there aren't any cartoons (I'm still working on those!!) but I was browsing basicbases and I found loads of different bases.</span>
Ravenclaw:
1) 2)
3)
4) 5)
Hufflepuff:
1) 2)
3)
4)
Slytherin:
1) 2)
3)
4)
Gryffindor:
1) 2)
3)