Oooohhh, those look cool! Thanks for the tip! Here's the link, if anyone is interested: http://www.thekittytube.com/brands/The-Kitty-Tube.html
(careful what you click when you Google "kitty tube".
"To close your eyes will not ease another's pain." ~ Chinese Proverb
“We must not refuse to see with our eyes what they must endure with their bodies.” ~ Gretchen Wyler