I'm thinking of keeping the same magenta-coloured wall that she has now, although that existing one will be knocked down, so I'll paint one wall in this colour again. I think a fresh coat of lime might look nice on the other walls. Kinda like some big candy apple!
And I am thinking of these three fabrics for re-covering her canvasses (at the moment they're Suzy's Zoo characters and she loves them.... perhaps I am doing this too soon):

Ah, stuff it. I feel like living dangerously. I'm going to get them. Such a cheap decorating idea, you really can't go wrong.