Nowt wrong with indoor poi... teaches good plane control. Luckily, we have high ceilings (and paper lampshades). Our kitchen's got a bit that's about the right size.
Saying that, I have killed a plate (first day with a staff. never _learn_ staff indoors. once you get better it dosn't matter so much) and a brand new unopened jar of my housemates dads homemade marmalade. Oh, and one of the paper lamp shades. Took several hits, but once you've got it once it starts to hang lower and lower until... well, it's still up, and it still shades the lamp, but only because it's quicker to get a chair and delicatly balance the coil of wire and paper that it's turned in to than it is to buy a new one.
Roll on summer, then we can go outside without fourteen layers of thermal clothing getting in the way of things...
Oh, and a soapstone incence burner.