You could hang them internally at the top of the upright walls and have a whole circular extravaganza going on. I have little toggles at the top of mine there so that I can roll the sides up.
Or you could attach several strings from top of pole and attach them, circus-like, to the toggles. That miiiiight be going a step too far though and I think my kids would garotte themselves as they do their usual 'run round the pole 400000000000000000000 times cos we can't run in circles at home'.
Or a spiderweb of fairy lights around and through the guys?