I can't paint my walls but I desperately want them to be animal print! What can I do?

Perhaps invent some stencils you could use with lamps that you already have; play the stencil shadows onto the white walls (perfect for this). You could also make use of colour too by using coloured celophane. Practice your effects with a torch in the evenings until you hit on what you are looking for. Also why not check out some of those children's toy, Geographic type or Save the Animals type of shops to see if they have any stick on or glow in the dark type decals. I would say try eBay and see what is available out there.