Terrarium Inhabitant suggestion!

Got my son this terrarium for his BP. I was able to get it to keep stable ideal conditions, but having a BP in a hide in it all day is kind of a waste. So I'm thinking of moving her to a rack but then would like to find something for this large terrarium. It's 3' wide 2' deep an 18" tall. What kind of snakes or other reptiles would be a good fit?

http://img.tapatalk.com/cfe11ac9-d038-efc8.jpg


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Some small lizards might be fun. Like anoles or something.
I really like knight anoles personally, and despite people saying they are evil, they're can really be quite handle-able!

Carpet Python. Mine hardly ever hide and are usually perched up in their branches. Irian Jaya adult would fit perfectly.