I totally agree with the whole climbing thing. From my experience, it seems like they like to climb when they're younger. I noticed that my younger Balls love their branches and leaves but my older ones just like to lounge around the tank when they're not hiding. Once in a while they also scale their branches but not as often as the youngsters. I figure I'll give them the means and they'll figure out what to do with it. Plus, all the leaves and branches make my tank seem less like a prison.
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