If you go to the "Free Range" section of the forums and look back at those threads, you will find a ton of great ideas!
My FR goes up to the ceiling and my panther spent much of the first 1 1/2 years exploring the entire downstairs. He had no problem walking around on the floor. Just be careful of other pets, kids, and always watch your step. I made sure to "chameleon-proof" everything!
Deb