update!
I'm also made some Bendable Wooden Ladder to go with my habitat.
I found out that these ladders were a bit pricey when bought online so why not make one for myself.
I only used dried and fallen of branches of local trees because they are much safer to use than fresh ones.
why? because the sun and the elements already evaporated any juice, scent or toxic that the tree might have BUT also make sure that the wood you're going to use is safe for rodents. Also, insects and parasites won't survive on dry wood but if you're Clean-freak like me; heat everything up on oven for 10-15 mins. provided that you don't burn your wood.