take a look at the pictures in this thread:
open top enclosure help
i have talked to a few people about my open top enclosure that i have already built for my leopard tortoise that i am getting next week. I need to put some sort of top on it. I have been advised to put either a screen or plexiglass on top of it. i would really like to use the plexiglass idea...tortoiseforum.org
Thank you!