I'm not sure I can wholeheartedly recommend this craft if you rent and plan to move, like, ever. Still, it's kind of cool and not the sort of thing you see every day.
Rather than repaint a bathroom floor, just cover it with duct tape. It comes in heaps of colors and is waterproof. With the leftovers, you can make hats or totes or roses, which would be perfect for Mother's Day.
Or, if nothing else, would give you a lot to talk about on Mother's Day.
I would suggest that you not use the stuff to contain your kids, no matter how tempting that may be.
Photo credit: ducttapeaddict